Just thought I would post a pic of these and let people know about them that don't. These are Heymous polishing bits. They are absolutely essential when polishing any kind of metal or just knocking down burrs all you have to do is just vary your Dremel speed. They're made from a high durometer ( hardness dial indicator ) of rubber and have little bits of cutting media scattered through them. They were absolutely essential in knocking down the rough cast parts on the 1911 I just bought. It's a umarex regent r200s stainless steel that's basically made by Tisas. Most of the rough cast parts had all the casting marks on them and were squared off and not smooth and just needed to be shaped up to look good. You could see where they had been putting in a stone tumbler just to knock the slag off and clean them up a bit but it still had a lot of the casting marks on some of the parts. From the tumbling process they also had little nicks where you could tell the tumbling Rock said dinged him up a bit but these sorted those out quite quickly. These are essential in knocking down those burrs and rounding off the edges so everything's nice and smooth and looks uniform in more of a cheap part into a refined part. The great thing is they remove metal but they don't leave sanding marks or heavy gouges you just vary the speed of your Dremel and the pressure you use on the parts you're working with. An absolute godsend when it comes to polishing or just knocking burrs off or rounding off hard sharp edges. You can get them on Amazon anywhere from 8 to 20 bucks depending on the number of pieces. Plus they work wonders when polishing M4 feed and ramps makes that a breeze. After grinding you don't have to go over it with different grids or polishing compounds or any of that noise you just use the bullet shape tips and go at it and it polishes as it removes metal. They are an absolute necessity with working on guns and removing metal very slowly but quickly if you know what I mean. Anyways I just thought I would post a pic you can get them on Amazon just look up Heymous polishing bits. The bullet shaped ones work great on feed ramps they remove just enough metal and leave a very clean polished surface when you're done. If you're into working on guns or anything like they're an absolute must. I first used them when I was polishing valve covers, throttle bodies, belt tensioners and any other aluminum piece on an LS series aluminum engine. They work wonders and thought I would share this piece of information with you so you don't have to sand from one grit down to the other just to get a refined surface. Once you remove the metal you need to remove just hit them with one of these and they'll polish it right up. No more of that polishing compound slinging all over your clothes and over everything else that's around. Give him a shot I think you'll like them.