7 Best Fence Strainers for Tightening Loose Wires

A sagging top wire is an open invitation for a determined goat or a curious calf to test their boundaries. That familiar droop in the fenceline isn’t just an eyesore; it’s a weak point waiting to fail. A quality fence strainer is the essential tool that turns a loose, unreliable barrier back into a secure enclosure.

Disclosure: As an Amazon Associate, this site earns from qualifying purchases. Thank you!

Why Proper Fence Tension is Crucial for Livestock

A properly tensioned fence is about far more than just keeping animals contained; it’s a critical component of their safety. A loose wire can easily entangle a leg or neck, creating a life-threatening situation for panicked livestock. In contrast, a taut wire acts as a clear, decisive barrier—both physical and psychological—that animals learn to respect, reducing the likelihood of them testing it.

Proper tension is also the key to a long-lasting fence. When an animal pushes against a tight wire or a tree limb falls on it, the force is distributed across the entire length of the wire and multiple posts. A loose wire concentrates that same force on a single post and its fasteners, leading to pulled staples, damaged insulators, and weakened posts. A tight fence works as a complete system, sharing the load and dramatically extending its functional lifespan.

For electric fences, tension is non-negotiable for effectiveness. A sagging hot wire will inevitably touch wet grass or a steel T-post, shorting out the entire circuit and rendering it useless. Correct tension keeps the wire suspended away from the ground and conductive materials, ensuring the electrical pulse travels cleanly from the charger to the animal, delivering a sharp, memorable shock that reinforces the boundary.

Gallagher In-Line Strainer: Top All-Rounder

The Gallagher In-Line Strainer is a permanent fixture you install directly into your fenceline. Built with a simple but robust ratchet mechanism and a high-quality galvanized or zinc-aluminum coating, it’s designed to live outdoors for decades. Once installed, you can make precise tension adjustments at any time using a compatible strainer handle, tightening the line click by click as it stretches or sags with the seasons.

This is the ideal solution for the hobby farmer with permanent pastures who values long-term reliability over temporary fixes. It’s perfectly suited for high-tensile smooth wire and woven wire fences that form the backbone of a property. By installing one every few hundred feet, you create adjustment points that allow you to manage fence tension without ever needing to cut and re-stretch an entire line, saving immense time and labor over the years.

If you are building a new permanent fence or overhauling an old one, the Gallagher is the gold standard. It’s not a tool for a quick patch, but an investment in the fence’s infrastructure. For a durable, low-maintenance system that you can easily tune up each spring, this is the professional-grade choice that pays for itself in reliability.

Drivall Hayes Wire Strainer for Heavy-Duty Jobs

The Drivall Hayes Wire Strainer is a temporary construction tool, not a permanent part of your fence. This "walking" style strainer uses a smooth-grip chain and a pivoting grab mechanism to pull incredible tension on heavy-gauge wire. You anchor one end and use the handle as a long lever to "walk" the chain, pulling the wire tighter with each motion before you tie it off at the end post.

This tool is for the farmer undertaking a serious fencing project, like installing a long perimeter of high-tensile or heavy-duty woven wire. It provides the mechanical advantage needed to stretch a wire to its optimal tension—something that’s nearly impossible to achieve by hand. It is overkill for a quick repair on a 50-foot paddock, but it is the right tool for getting the foundation of a large fence perfectly tight from the start.

Get this tool if you are installing hundreds of feet of new, heavy-gauge wire. Think of it as a construction tool, not a maintenance gadget. For that initial pull that sets the structural integrity of your entire fenceline, the Drivall Hayes delivers the power and control that smaller tools simply cannot match.

SpeeCo Chain Grab: Versatile Wire Stretching

The SpeeCo Chain Grab is not a strainer itself, but rather a simple, brilliant device that makes other tools work better. It’s a small metal tool with a pivoting, cam-shaped jaw that grips wire tighter the more you pull on it. You attach it to the wire you want to stretch, then hook a come-along, winch, or even a tractor to the grab’s ring to do the actual pulling.

This is the perfect tool for the resourceful farmer who wants to use existing equipment for multiple jobs. If you already own a come-along (cable puller), this grab is the missing piece for all your fencing repairs. It excels at splicing broken wires, allowing you to grab both loose ends and pull them together so you have enough slack to tie a knot or install a crimp sleeve. Its design grips the wire securely without kinking or damaging it like pliers can.

If you value versatility and believe in multi-purpose tools, the SpeeCo Chain Grab is an essential addition to your toolbox. It’s not a standalone solution, but it unlocks the fencing potential of tools you likely already have. For splicing, repairs, and general tensioning tasks, its simplicity and reliability make it the most flexible option available.

Gripple Plus: Fast, Tool-Free Tensioning

Gripple Plus joiners are a modern solution to an age-old problem: quickly joining and tensioning wire. Each Gripple is a small device with an internal ceramic locking mechanism that allows wire to pass through in only one direction. To join two wires, you simply feed them in from opposite ends; to tension, you loop a wire through and pull the tail end with a special Gripple tensioning tool until it’s tight.

This is the answer for the time-strapped hobby farmer who needs to make a fast, dependable repair and get on with their day. Finding a snapped high-tensile wire an hour before you have to leave for work can be a disaster, but with a Gripple, you can have it repaired in under a minute. They are perfect for emergency fixes and for people who aren’t comfortable or proficient at tying traditional fencing knots.

For emergency repairs and lightning-fast splices, Gripples are unbeatable. They are more costly per unit than a simple knot, so they aren’t the most economical choice for building a brand new fence from scratch. However, keeping a bag of them on hand is cheap insurance against a loose-livestock crisis. If you prioritize speed and simplicity above all else, this is your tool.

Zareba Ratchet Strainer for Easy Adjustments

The Zareba Ratchet Strainer, often called a "ratchet wheel" or "spool" strainer, is an in-line strainer that works exceptionally well with softer fence materials. It’s installed by cutting the wire and attaching each end to the spool. You then use a wrench or a dedicated handle to turn the spool’s center hub, wrapping the wire around it and removing slack with each turn.

This strainer is the go-to choice for the most common types of hobby farm fencing, including polywire, polyrope, and standard 12.5 gauge galvanized steel wire. It’s ideal for rotational grazing systems where fences are semi-permanent and may need frequent tension adjustments. The smooth spool won’t damage the delicate conductive filaments inside poly-products, a common problem with more aggressive strainers.

If your farm relies on poly-fencing or standard steel wire for paddocks and interior divisions, the Zareba is a workhorse. It may not be robust enough for a high-tensile perimeter fence, but for the vast majority of small-farm applications, it delivers the perfect combination of affordability, ease of use, and functional reliability.

Maasdam Pow’R-Pull for High-Tensile Fencing

The Maasdam Pow’R-Pull is a classic come-along, a hand-operated winch that uses a ratchet and pawl system to pull heavy loads. While not exclusively a fencing tool, it’s the engine that powers many large-scale tensioning jobs. When paired with a wire grab, it provides the raw, controlled force required to properly stretch long runs of high-tensile wire.

This is a foundational tool for the homesteader building a serious, long-lasting perimeter fence. High-tensile fencing relies on extreme tension to function correctly, and a Pow’R-Pull provides the thousands of pounds of force needed to achieve that. Its utility extends far beyond fencing, making it useful for pulling stubborn posts, moving small logs, or getting a mower unstuck from the mud.

If you are building with high-tensile wire, a quality come-along like the Maasdam Pow’R-Pull is a non-negotiable piece of equipment. It lacks the finesse of smaller, dedicated strainers for minor repairs, but for the initial construction and major re-tensioning jobs, its brute strength and versatility are indispensable. This is for the farmer who buys one tough tool to do many tough jobs.

Dare T-Post Tightener: A Simple, Budget Fix

The Dare T-Post Tightener is arguably the simplest tool on this list. It’s a small, slotted metal clip that attaches to a standard T-post. You slide it over the loose fence wire, insert a handle or wrench into the tightener, and rotate it. This action wraps the wire around the tightener, creating a sharp kink that effectively shortens the line and removes slack between two posts.

This is a spot-fix tool for the farmer on a tight budget dealing with minor sag in an existing T-post fence. It’s not for new construction or significant repairs. It’s the perfect solution when you notice a single wire has just enough droop to risk grounding out on the grass but you don’t have time to cut the wire and install a proper in-line strainer.

Think of this as a quick and dirty patch, not a permanent solution. It’s the cheapest and fastest way to solve a very specific problem. While over-tightening can weaken the wire at the kink, for a quick, temporary fix to get an electric fence working again, it does the job for pennies.

Choosing the Right Strainer for Your Fence Type

Your first consideration should be the job at hand: new construction versus ongoing maintenance. For building a new fence, you need temporary tools like the Drivall Hayes or a Maasdam Pow’R-Pull to achieve the initial high tension before tying off the wire. For long-term maintenance, permanent in-line strainers like the Gallagher or Zareba models are installed in the fenceline to allow for easy future adjustments.

Next, you must match the strainer to your wire type.

• High-Tensile Wire: Requires heavy-duty tools that can handle extreme force. The Drivall Hayes, Maasdam Pow’R-Pull, and Gallagher in-line strainers are all designed for this.
• Woven Wire: Can be tensioned with heavy-duty pullers, but often requires a special stretcher bar to distribute the force evenly and avoid damaging the mesh.
• Polywire/Polyrope: These are relatively delicate. Use a spool-type strainer like the Zareba that won’t shred the poly-filaments or break the fine conductive wires inside.
• Standard Steel/Aluminum Wire: Most strainers will work, but a simple ratchet wheel is often the most cost-effective and functional choice.

Finally, consider your overall fencing strategy. If you practice intensive rotational grazing with many small, frequently moved paddocks, the speed of Gripples or the adjustability of Zareba ratchet wheels is a huge advantage. For a permanent perimeter fence that you want to set up once and only touch once a year, the durability of a heavy-duty Gallagher in-line strainer is the more logical investment.

Fence Strainer Safety and Maintenance Tips

The single most important rule of fence tensioning is to always wear safety glasses and sturdy gloves. A wire under thousands of pounds of tension stores an incredible amount of kinetic energy. If the wire, a knot, or the tool itself fails, the wire can snap back with enough force to cause severe injury. Always stand to the side of the line you are pulling, never directly in its path.

Before applying significant tension, double-check your anchor points. Your brace posts at the corners and ends of the fence are the foundation of the entire system. If a brace assembly is weak or the posts are rotting, applying heavy tension will simply pull them out of the ground, creating a dangerous situation where posts and wire can be thrown. Ensure your anchors are solid before you start pulling.

Give your tools a quick inspection before each use. For come-alongs and chain strainers, check for frayed cables, worn ratchet teeth, or bent hooks. A little spray lubricant on the moving parts of a ratchet will keep it operating smoothly and prevent it from seizing or slipping under load. A well-maintained tool is a safe and effective tool; a neglected one is a hazard waiting to happen.

A tight fence is more than just a line on a property map; it’s the foundation of good livestock management and peace of mind. Choosing the right strainer isn’t about finding the most powerful tool, but the smartest one for your specific wire, your type of fence, and your goals. With the correct tool in hand, maintaining that secure boundary becomes a quick chore, not a daunting project.