YKLP 8inch Diamond Coated Triangle File Plastic Handle Hand Tools for Grinding on Glass, Stone, Marble, Rock, Bone 120 Grit1

My file came well protected, well packaged in a small plastic bag and taped around at 3 places. The file itself comes in a reusable plastic sleeve. The file is attracted to a magnet, so presume it is steel. Pretty, chrome- like appearance. Covered with diamonds at all surfaces from the end, and for 7 inches toward the handle. The file profile is more than 7-7/8" long, before the shape changes to make the tang. Some people did not like the handle, and actually my handle has a crack at the front and at the back, where the file enters the handle. When it becomes necessary, will just improvise with a hole drilled in a dowel, and then taper the hole with a reamer. May need to put some toothpicks at the bottom to get a good fit. Maybe glue, even. Or maybe I'll just put a hose clamp where it is cracked. But not a big deal to me. Would just as soon pay less for the object of the purchase. The radius of the file at the small end, closely matches a 7/8" outside diameter plastic tube. Slight burr was left at parts of the edges, before it got coated with diamonds, but not an issue for my purpose. I got this for sharpening serrated knife blades. The tapered round diamond sharpener that I originally bought for this purpose, has a diameter of only about 3/8 inch at most, so for the serrated knife that I tried it on, I would have had to do a lot of filing to get the serrations to match that sharpener's largest diameter. But this file happens to fit the serrations well on the knife I tried. Not many strokes and it made the knife good and sharp at the serration that I tried it out on. It says 120 grit, which is coarse compared to what I usually use on a straight knife edge. But, it felt sharp to my fingernail, and I can use my smaller diameter round tapered file to touch it up if necessary, but I had found it hard to maintain the shape of the serration when I used my smaller tapered file. So, bottom line is, if the knife cuts well using this file alone, and holds it's edge, that's good enough for me, even if it was not sharpened to as nice an edge as I get my straight knives. We just use this knife for bread, I think. And actually, the micro roughness of the edge might have a better sawing effect than smoother, more perfect edges. There are steak knives made with tiny teeth, that do well on meat. But I won't try to comment on the uniformity of the diamonds or the density of the diamonds, or the straightness and uniformity of the shape of the file; but it looked "pretty good" looking down the length of the file.

works well

works for tile

My left hip doesn't work well anymore, so I needed a LONG handled toenail file for my left foot. This tool looked like it might work, and it does! It's coarse enough that I don't have to go over and over the same area, and the result is smooth nails, which is quite surprising! I've been using a pet toenail grinder for my right foot, but it's handle not long enough to reach my left toenails. The disadvantage of the grinder is that it takes a long time to sand down the toenails and it sometimes abrades my skin. I used this new tool on all lmy toenails also and it was easier and faster than the pet nail grinder. I thought I would rotate this tool across each nail, but instead, I'm pulling it up slowly to file vertically, not horizontally. My husband already glued a Diamond Deb nail file into a long piece of wood that I used to CLEAN my toenails, but I needed something to file them down when they get too long. A nail clipper just splits the nails and leaves rough spikey edges that tear sheets and scratch your skin. This tool works a lot better than clippers. I'm actually amazed. The trick is to move slowly, so you don't abrade your skin. The tool is so coarse, moving slowly does not appear to diminish its effectiveness.

Worked for what I needed

I haven’t used these files much yet. One problem is the tangs are short and the handles fall off. I guess I’ll have to epoxy the handles to the file when I have some extra time. I will be able to get a better idea of the file quality. I purchased these to touch up knife blades after the blades are hardened and tempered.

Very nice diamond file. Using it to tune ski edges and seems to work fine. Standard files are too easily dulled.

I saw a video on YouTube where Stud Pack was cutting some tiles and used a file to smooth the edges. I am mitering some tiles and was in desperate need of something that works. Those pads are junk so I gave this a try. Boy am I happy that I did. This thing really works. Trick is to keep it wet. This was used on Home Depot 12x24 tiles and I would definitely recommend to have it in your toolkit!