Related Products Diamond lap disk 6” PSA backing 180 grit $30.00 12 x 12mm diamond bands, soft type 800 grit $16.00 Quantity Add to cart Product added to wishlist. Description 12mm x 12mm diamond bands are an alternative to solid diamond points. They fit on an expanding mandrel with a 3mm shaft. The diamonds are electroplated to a material substrate. 800 grit. Add to WishlistProduct added! Browse WishlistThe product is already in the wishlist! Browse Wishlist Share Product code: 401800 Category: Diamond point sets and bands. Tags: diamond points diamond bits, glass work, Grinding wheels, lapidary.