Review on 🛠️ Kutzall Extreme Ball Nose Burr: Versatile Woodworking Attachment for Dremel, Foredom, DeWalt, Milwaukee - Very Coarse, Tungsten Carbide, 1⁄8" Shaft, 1⁄4" Dia. X 1⁄2" Length, BNX-14-EC by William Hood

I bought this for some solid core doors that were old enough to have really tiny holes for the original door handles. The previous owner apparently attempted to install new doorknobs while completely stoned. I discovered amoeba-shaped holes in the door while filming the world's ugliest doorknobs. The sheer randomness of the amoeba holes made it impossible to use a hole saw. This little ridge on my Dremel allowed me to work outwards after I found where the center of the latch should be and only focus on the areas that needed to be enlarged. Yes, they're still amoeba holes, just bigger amoeba holes with much nicer hardware above them. The Kutzall bit worked about a million times better than any Dremel bits I have, which is saying a lot. It chewed through the wood fairly easily, leaving a relatively clean edge. I used low speed on my dremel. I haven't had any problems with shaft bends or blunt teeth. I made nine doors and the ridge looks as sharp as it did at the beginning. I would like Kutzall to offer a larger drill bit for the 1/8" shank, but that may just not be possible. This drill worked well but felt a bit slow compared to the much larger drills with a 1/4" shank. .