Related Products Electroplated diamond core drill, 6mm dia. 8mm shank. $10.00 Electroplated diamond core drill, 10mm dia. 8mm shank. $16.00 Resin diamond belt, 6″ x 2.5″ (150 x 65mm) 280 grit $50.00 12 x 12mm diamond bands, soft type 120 grit $12.00 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. 100 grit. Add to WishlistProduct added! Browse WishlistThe product is already in the wishlist! Browse Wishlist Share Product code: 401100 Category: Diamond point sets and bands. Tags: diamond points diamond bits, glass work, Grinding wheels, lapidary.