Features:

  • The only flexible extension where entire outer surface does not rotate
  • Outperforms the competition based on independent test results
  • This product is made of high quality material
  • For controlled cuts in drywall
  • For materials up to 1-Inch thick
  • Shank Diameter: 1/8-Inch
  • Bit Material: High Speed Steel
  • Compatible with all RotoZip Spiral Saw power tools
  • For controlled cuts in drywall
  • For materials up to 1-Inch thick
  • Shank Diameter: 1/8-Inch
  • Bit Material: High Speed Steel
  • Compatible with all RotoZip Spiral Saw power tools
Much better than DeWalt bits - well designed, sharp, easy to use.

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.

It works great. It was my first time using the bit ...

It works great. It was my first time using the bit with my Dremel when finishing my basement. Only used one bit to cutout 12 holes for recessed lightning, 15 outlets and cutout multiple drywall. I set the speed of my Dremel at 2500 rpm.

Very handy!

The bit works great. It’s difficult to feel your way around stuff, especially plastic elect boxes, but that’s on me not the tool itself. Guessing steel boxes would give you a better feel. FYI, if you’re doing recessed lights, get yourself the tool and this bit. That combo is worth it’s weight in gold. I’ve used it hard and heavy and it still works good.

These work great, You will break one once in a while ...

These work great, You will break one once in a while so go with the big pack. Used in my air die grinder, didn't want to buy a die grinder just for drywall jobs. Worked great.

Keep a firm grip on your tool !!!

Great bits! Just be careful to keep a firm grip on your tool. These things cut through sheetrock/drywall like a hot knife through butter! I've made a few unintentional cuts by not realizing how fast the bit was moving!!!

The picture was my first test hole.

Planning on a whole house audio system in a home under construction will have about 14 speakers that I mounting to the rafters on ¼ inch plywood. Used the RotoZip GP8 1/8-Inch Guide Point Drywall Cutting Zip Bit to see if it would cut the drywall with the plywood speaker mount as a guide. The picture was my first test hole. Works quickly and does the job I will need .

Excellent value and exactly what I wanted.

Local big box stores only have multi assortment packs with one of these for around 8 bucks. If I broke the one I wanted, I would have to buy another pack. This pack had 8 bits. That's just over a buck each. I trimmed out drywall for 120 square foot room with one bit. The guide point is perfect for not damaging wood and plastic electrical boxes behind the drywall. First heard of these bits in a YouTube video on building a shed. Surprised that it is not a more commonly used item.

Lifesaver!

Bought these while drywalling whole basement. Only broke 2 the whole time. Both due to my stupidity. Hold up really well. Only broke when trying to force the tool to go quick and hitting metal recessed cans hard.

Sharp, long lasting, good value

Much better than the bits that came with the tool. Cut fast and wear well. My house was built in 1812, and even the interior walls tear up reciprocator bits in no time, but these last quite a while.

Check bit diameter before ordering

These are standard replacement bits, but I got tripped up by the statement “Fits all Rotozip models”. I found that my Rotozip was using the 5/32” bits, so I sent these back, but now realize that the collet system is interchangeable for 1/8”, 5/32” and 1/4” bits, assuming you want to drop a few extra bucks for a set of collets.

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