SCOTTCHEN Diamond Grinding Wheel Disc 6" x 1/2" Arbor Hole 180 Grit Abrasive Flat Lap Wheel Sanding Disc for Granite Marble Gem - 1pack

Sharpened my carbide paint scraper in record time

This is very aggressive but I’ve spent money hours using it and it’s barely beginning to show loss of function

These topper laps work well for me. I would avoid using these past about 800 grit however. The grit consistency is not very good and in the high grits I always have scratching like a lower grit which makes the higher grit pointless. If you have used more quality laps, you might find the grit level to be a bit off. For example I have an 800 grit lap that cuts more like a 400-600 if compared to a Crystalite lap. I have a 3000 grit lap that leaves random scratches like a 400-600 grit but it cuts as fast as a 3000 grit so that lap is junk and I don't use it. I have a 1000 and a 1200 that have similar issues. I recommend these laps to help save money as long as you stay under 1000 grit.

The product works well, fits with my machine and came quicker than I expected.

I use this lap after my 60 grit course lap. It works very well and is holding up great. I'm not using a backer plate as this sits flush against my wheel but if I didn't have a backing support I would use some kind of plate backer just for support. Diamond coverage is excellent and break in was easy with very little loose material coming off.

Spins true and leaves an exceptional edge on tools I will be adding the finer grits to my collection to further improve my sharpening abilities

I bought three of these (120, 300, 600). They came nicely packaged but I was concerned about them getting dinged on the edge of bent because they used a plastic envelope instead of a box that could protect them in shipping. Of the three, only the 600 was without major flaws. It appears they use their worst blanks on larger grit sizes and flatter disks on smaller grits (600). The 600 was fairly flat, the 300 was pretty good, but the 120 is a potato chip wavy. The OD is a reasonable approximation of 6" but you can't get a true measurement because the outer edge is also electroplated with diamond. Unfortunately so is the inner hole which is a bit oversized so even with the diamond coating it fits over your spindle but will likely damage it. I don't expect them to run true.All of them have contamination on the back but most of it should wash off, except for the 120. The 120 had a coating on the back that is mostly peeled off, you can see the back of the 120 in the first picture. Even if the disk was flat then the partial coating would prevent it from laying flat on the master lap. They all had a raised burr on the back outer edge and the inner hole and there was diamond coating on the outside edge as well. On the outer edge of the 120 and 300, there's delamination of the diamond and electroplating that can be seen in all of the pictures as shiny areas.I guess now I'll find out of they read their review and find out how good their customer service actually is.

they work amazing for shaping hard stone, or grinding out rough cuts in stone... super smooth cuts, level, wonderful discs