RotoZipGP8 1/8-Inch Drywall Guidepoint Cutting Bits (8-Pack), Cutting Drywall, For use with Roto Zip Spiral Saw

The bits worked perfectly for working around electrical outlets, making clean cuts.

Cut drywall great, sharp, durable, easy to use, functioned as described with rotozip.

One blade gets you a lot of cuts in drywall. They're pretty loud but chop through super clean.

Made in Brazil

I used these bits with Dewalt DW660 drywall router. In the past, I used Dewalt bits, but those are no longer available. Now I understand why you cannot get Dewalt bits - the Roto Zip ones are much better. The key differences are that the non-cutting tip of the bit is shorter (which is good, DeWalt bits had too long of a tip, to my taste), and that the bit appears to be sharper (at least, it seems to cut easier).I've seen reviews where people wrote that the bit is easy to break. You have to do something wrong to break it while cutting drywall. Here are some tips to reduce the risk of breakage:1. When you install it in your drywall router, slide it into the collet to the point where spiral cutting edge begins. You do not want the collet to grab by the cutting part with spiral cutters, but stick it in as far as possible all the way to the cutters. Do not let the bit stick out more than that. The longer is the exposed part of the bit, the easier it is to break it. Just think about leverage applied to a long bit.2. Set up depth collar on your drywall router in such a way that the spiral cutting edge starts on the other side of the drywall. This means that you will set the depth of cut at thickness of drywall (usually 1/2") plus about 3/16" (which is the length of the very tip which does not have cutters, plus a little extra). If your router does not cut the drywall easily, it most likely means that you set the depth of cut too shallow. Remember, the very tip of the bit does not have the sharp cutting edges. It is used to guide the bit along the edge of your light can or junction box. IT does not cut. Only spiral cutters can cut the drywall. If the cutter-less guide tip is not entirely on the other side of the drywall, you will not be able to cut. It would be like chewing without teeth. When you are setting the depth of cut against a scrap piece of drywall, you should see the beginning of the cutting edge on the other side of the drywall. If you cannot cut drywall like butter because you set the depth of cut incorrectly, you would end up pushing on the router too much trying to make it cut and would break the bit in no time.3. No strong pressure on the router. The force should be light, and mainly directed towards your box / can to make sure that the router follows its contour. In other words, you should feel more pressure towards the box along which you are cutting (and against the drywall, to make sure that the depth limiter is always in touch with the drywall) than in the direction in which your cut goes. Drywall is very easy to cut. It is soft. Any excess force would lead to either router wandering off the desired path, or breakage of the bit.The last but not the least, as you certainly know, when you cut around a box on along its outside (external) edge, you route counter-clockwise. This reduces the odds of router going off the path because it creates a force which pushes the bit towards the edge of the box.

there were good

These work ok for cutouts around outlets and switches but tend to break easily. I am going to look for sturdier ones next time

Las e probado poco, pero hasta el momento son bue

Preformed well ,doesn’t like steel electrical boxes,lol

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I've done an entire floor with a single bit (including one room with 2 layers of 13mm fireproof plasterboard), and it is still going strong. I didn't even need the other 7 bits in the pack!

Did work well in my roto zip 👍

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