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Zareba Wood Post Screw-In Insulator, Black, Pack of 20

SKU: 360984599
Zareba Wood Post Screw-In Insulator, Black, Pack of 20
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Product Rating is 2.4


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Looking for a way to firmly fasten electrified wire to your wooden posts so they don't become loose and lose energy? The unique Zareba Ring Insulator fits the bill exactly! These insulators have an angled slot that ensures wire retention. They work with wire and polyrope. These electric fence insulators come in black color only and are packed 25 per bag.

  • Angled slot ensures wire retention
  • For 9 gauge through 22 gauge high-tensile steel wire and aluminum wire, all polywire (both regular and heavy duty), and polyrope up to 1/4 in. in diameter
  • Color: Black only
  • Packed 25 per bag

Specification Description
Brand: Zareba
Fence Wire Type: Steel/Aluminum/Polywire
High Tensile: Yes
Fence Post Type: Wood
Manufacturer Part Number IWSIRB-Z
Zareba Wood Post Screw-In Insulator, Black, Pack of 20 is rated 2.4 out of 5 by 21.
Rated 4 out of 5 by from Cheap and easy insulators You get what you pay for applies to these. If you want permanent insulators buy more expensive ceramic ones. You should pre-drill for both kinds. These will work okay for lite gauge wire (17 ga.) but can't hold up to the tension that heavy gauge wire fences need. Not good for corner post where you will be pulling against them, even on 17 gauge fence. They will break quicker with tension on them, either from fence tightening or from animals pushing on fence. I have broken several off when installing them by using pliers (with pre drilled holes). They are strong plastic, but don't expect the performance of ceramic at this cheap of a price... I have learned to only use these on the line post to hold the wire in place and I use other means at the corner post or at any tension point (mostly ceramic insulators). Only been using them for a bit over a year so I can't say how long they will hold up to the hot sun and UV's. Time will tell, but as cheap and easy as they are I will simply replace any as needed. I only have a hot wire fence for a few goats and a digging out dog. Started out with a small zapper and it cured the dog but the goats would still break out. Once I got a larger zapper ( .5 joules ) that cured the goats from going anywhere near the fence, even my large male wanting to get to a separated female in heat. Bottom line, If you need a permanently secure hot wire fence (for large headstrong animals, or crazy deer...), don't rely on them if you don't want any consequences due to one or more of them breaking, possibly causing your electric fence to be inoperable. If you need a semi permanent fence, they are cheap and easy.
Date published: 2015-12-10
Rated 4 out of 5 by from Nice for temporary fencing By temporary, I mean a few years, lol. We used small electric string fencing with step in posts and wooden corner posts. Used the screws on tge wooden posts. Don't recall any breaking. I know I did have one break this year when horse broke through the fence in a huge storm, but fence broke as well. We always drilled pilot holes on most things we screw, so maybe people need to try that. If you're foals are hard on fencing why do you have them in anything but wood or hot cote? I liked the screws, they worked great with correct installation ;)
Date published: 2015-10-18
Rated 1 out of 5 by from Garbage Save your money, these insulators are nothing but junk. the break just looking at them.
Date published: 2015-10-16
Rated 1 out of 5 by from They break They will last for several months if there is not too much tension. I'm getting tired of having to replace on a regular basis. Will not buy again.
Date published: 2015-09-10
Rated 4 out of 5 by from Works fine in trees I use these to put up temporary electric fencing for pigs. It works fine, hand screwing into the trees. I use them in corners and put tension on the lines with ratchet tightners. I even have pigs hit the line kinda hard at times, testing it. I have used them for about 6 months, and not a one has broken. I have lost a half dozen or more of the yellow nail-in kind, and those tend to pull out. If you are trying to use these in hard treated wooden post, pre-drill. If you are using more than your hand to screw them in, PRE-DRILL. Common sense folks, they are plastic after all.
Date published: 2015-08-14
Rated 1 out of 5 by from Awful! I bought 5 bags for my horse fence. They didn't last more than 2 days and the fence wasn't even completed before most of them broke! Don't waste your money on these cheaply made pieces of junk. I don't usually write reviews, but these are just so awful, I hope you heed my advice and don't spend a cent on this worthless product!
Date published: 2015-04-24
Rated 5 out of 5 by from they worked for us I was surprised to read the negative reviews. I used these on light wooden stakes to make an electric fence for horses and cattle. they have worked well, no escaped animals, no broken insulators . the deer do knock down my fence sometimes over night but I just put the stakes upright again and the fence is "fixed"! also I pre-drilled the holes to make it easier to screw the insulators into the wood. maybe that made a difference?
Date published: 2015-03-20
Rated 1 out of 5 by from junk These things will break just looking at them. Too weak
Date published: 2014-09-13
Rated 1 out of 5 by from Horrible waste of money While attempting to put these up we broke about a quarter of them, they are flimsy and break right off the screw unless you have a special tool for a drill to put them on. Another quarter of them broke on the fence line from the horses pawing at the fence (yes the electric is on, colts are admittedly hard on fence). After 2 weeks I took them all down and replaced them. They look nice, but don't be fooled like I was. The heavy duty white or black claw insulators are the only ones I will purchase in the future, and unfortunately my TSC doesn't carry them.
Date published: 2014-07-19
Rated 5 out of 5 by from Black screw-in insulators These things worked great for me. As a long-time DIYer I know that screws going into wood should have a pre-drilled hole. Do that and you will have know problem. Anyone who has to use pliers to turn them in didn't pre-drill. If you're riding fence in the north 40 use a hammer and nail The hammer pounds it in and pulls it back out leaving the screw hole.
Date published: 2014-07-01
Rated 1 out of 5 by from No Good!!!! Do not waste your time and money on these. They are very weak.
Date published: 2014-06-14
Rated 1 out of 5 by from JUNK!! 1 broke before I could get the wire on. 2 broke after 20 mins of putting on the wire. They didn't even last the night. I now have to replace them to keep my horse in the fence. Will never recommend these to any one.
Date published: 2013-11-19
Rated 1 out of 5 by from Very poor quality This was a terrible buy! They break very easily when installing them with pliers. They also break over time with too much tension on the wire or electric rope. They didn't even make it a year... I replaced them all with ceramic screw in insulators and have been very pleased!
Date published: 2013-06-13
Rated 1 out of 5 by from WORTHLESS!! The packaging for this product claimed it to be rated for high tensile wire, among other things. As soon as we started tightening the wire these worthless pieces of junk began popping like overpriced corn at a mantinee. Deer ran through the fence and popped them as well as the horses before we could get power to it. I would not buy these again on a dare. No, I would NOT recommend this product to anyone, regardless of how you skew the review page.
Date published: 2013-06-12
Rated 5 out of 5 by from Surprised by negative reviews; love the product I was suprised to read the negative reviews. I have a three rail fencing and use the Hot Wire to keep the horses off the fences. I have all my wires hung with the Ring Insulator with no issues. I remember breaking one, maybe two when turning them into the post, however each time it was because I was hitting the edge of a knot in the would. After two years I am heading back to buy a spare bag as I found a broken insulator; but I would not consider that a negative after two years of exposure to heat and extreme cold.
Date published: 2012-05-18
Rated 1 out of 5 by from Junk Weak, weak, weak. Broke like like a row of dominoes falling down as soon as a deer put some pressure on the rope. Had to replace all of them. Completely inadequate for typical applications. The plastic is brittle and snaps right off beyond the screw.
Date published: 2011-11-18
Rated 1 out of 5 by from Insulator Absolute junk. Save your money. They do not hold up to any tension at all.
Date published: 2010-12-15
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