Zareba® In-Line Wire Strainer

Model #: ILS1

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  • Use with 200,000 psi wire
  • Increases the tension on the fence wire to about 250 lbs
  • Install one every 1,500' - 2,500'
  • Locate in the middle of a fence span
  • Service Experts Available To Answer Your Installation Questions

Zareba® In-Line Strainer

Too much slack in your electric fence line for it to be truly effective?

Our Zareba® Electric Fence Strainers, used with the strainer handle, increase the tension on the fence wire to about 250 lb. Strainers should be installed every 1,500 ft - 2,500 ft. They should be located in the middle of a fence span (for example, halfway between two corner posts.)


Every friction point (corners, bends, dips, rises) reduces the strainer's tension capacity by about 500 ft. One strainer can tension wire through no more than two corners.

This Zareba® In-Line Strainer is to be used with 200,000 psi wire.

Zareba® is the largest manufacturer of electric fence systems offering durable, reliable electric fence products for all of your animal fencing needs.


Zareba® In-Line Strainer - Specifications

  • Increases the tension on the fence wire to about 250 lb
  • Use with the strainer handle
  • Use with 200,000 psi wire
  • Install one every 1,500 ft - 2,500 ft
  • Locate in the middle of a fence span

Disclaimer: does not endorse any information contained in product reviews. Please follow all label instructions for your specific use.

Most Recent Customer Reviews

Review Rate
Review posted on
May 15, 2018
Makes it so easy to build a fence By Jaky

Very Good product!

Review Rate
Review posted on
October 20, 2017
great! By Jody

Wire strainers like these are he greatest gift to fence building yet created. These are without a doubt the best bang for the buck available on the market. Reliable, strong, and everlasting.

Review Rate
Review posted on
April 2, 2017
5 stars great!! By Ron

5 stars, best on the market, reliability and dependable! Have used others and regretted it! They are well worth the price and always keep extra on hand! Thank for a great product!!

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All About

Benefits and Considerations of High Tensile Fencing

High tensile fence is an excellent choice to safely contain most species of livestock, including various exotic species. It is also equally effective keeping unwanted predators, deer or other wild animals out.

High tensile is an affordable, low maintenance permanent perimeter fence, lasting over 40 years. It works as a simple barrier fence or can be electrified for greater effectiveness and animal safety.

The key to a successful high tensile fence installation is advanced planning, combined with proper tools and quality materials.

We recommend Zareba® high tensile components, which are rugged, reliable and designed to withstand harsh environmental conditions, providing long life for your fence.

Zareba® has developed high tensile videos to help design and build your high tensile system. Once you build a high tensile fence you won't want any other type of fencing system.


Expert Tips


Posts for High Tensile Fencing

Because the distance between posts in a high tensile system can be 30’–90’, and the wire is under tension, wood posts are recommended.

Line posts should be a minimum 4” in diameter, with 6-8” diameter posts used for corner posts and gate posts. In some cases T-posts may be used for line posts.

More High Tensile Post Tips»



High Tensile Line Post Insulators:

We recommend either pin lock or tube insulators for high tensile fence systems. Both allow the fence wire to move as needed.

High Tensile Corner & End Post Insulators:

  • Wrap Around Insulator – Slide wire through tube and wrap insulator around corner or end post. Secure with 2” barbed staple. Durable polyethylene with poly insert for added strength.
  • Donut Corner Insulator – made of unbreakable polycarbonate, extremely strong with 5,000-lb. tensile strength.
  • High-strain Corner Insulator - made of fiberglass reinforced nylon, engineered for full tension of 200,000 psi wire.
  • Porcelain - very strong


How to Electrify Your High Tensile Fence

If electrifying your fence, you need to make electrical jumper connections between all electrified fence wires.

Use a length of 12 1/2 gauge wire as a jumper and connect it to a hot wire with one of the extra crimping sleeves placed on the “hot” fence wires prior to tensioning. Crimp to attach.

Then slide a section of insulated plastic tube, or insultube, over the wire to prevent it from touching the non-electric wires. Crimp.

Repeat until all electrified wires are connected. Next, install and connect your electric fence charger to the fence.

More High Tensile Expert Tips»


FAQs about High Tensile

Q: What are some of the benefits of a High Tensile Fence?

A: A high tensile fence system is affordable, long-lasting, very durable, easy to install and requires a minimum level of maintenance. Such a fence system can last more than 40 years if maintained properly.

This cost-effective fence system is an excellent way to contain livestock, other farm animals and pets while protecting them some types of predators.


Q: Will a Spinning Jenny work with barbed wire?

A: No. The Spinning Jenny will not work with barbed wire. Barbed wire is not spooled in the same size and shape as smooth high tensile wire is spooled.


Q: Do I need special tools to build a high tensile fence?

A: Yes, there are specific tools you should use to make the installation of a high tensile fence easier. Zareba has a complete selection of specialized tools for building your high tensile fence. Check out High Tensile products in our website store.

More High Tensile FAQs»

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