1lb MJR Tumblers 36 Grit Premium Extra Coarse Extremely Fast Cutting Silicon Carbide Rock Polishing Grit for Step/Stage 1, MJR Tumblers is a Disabled and Veteran Owned Company Proudly Located in USA

Bought to add to bedliner paint to add grit for my running boards.. works great for that..

MJR always delivers the best grit for my rock tumbling. It was delivered quickly, just a few days, and is always free shipping and packaged well.

Great product quick delivery

Purchased this, and the 4-step refill kit for 15lbs of rocks.... I thought from the photos that there would be nice labels on the bags to tell the different grits apart easily.NOT SO... just a small clear label with small text (cannot read from 5 feet, even with glasses) and a qr code. By sight this looks exactly the same as the 60/90 step 1 grit from the other kit. I don't want to get the two grits confused as there's a huge difference in how much they cut.... SO I will have to make my own labels.Other than that, seems to be a good product.EDIT: ran a 4-day tumble on step 1 with Nat Geo tumbler on speed 3 with this grit. Not any more effective than a 48 hour tumble, grit breaks down pretty quickly, and by day 4, once the grit was washed and dried, it feels about the same as 400 grit and only about 1/3 of it remaining, rest was broken up small enough to wash away with the rinse. Gonna try it again on speed 1 & see if that makes a difference in how long it lasts.

A very good item to use for tumbling rocks.

Works like it's supposed to, easy to use, good quality of grit, rocks look good after stage 1 polish. I will purchase this again as well as stage 2 and 3 grits.

ordered it got it the next day

Works great for sea glass.