Related Products Diamond lap disk 6” PSA backing 100 grit $38.00 excl GST Diamond saw blade 300 x 1.2mm $70.00 excl GST 12mm x 12mm diamond bands, soft type 400 grit $19.00 excl GST 12mm diamond band mandrels $15.00 excl GST Quantity Add to cart Product added to wishlist. Description 12mm x 12mm diamond bands are an alternative to solid diamond points. This is the expanding mandrel with a 3mm shaft. Add to WishlistProduct added! Browse WishlistThe product is already in the wishlist! Browse Wishlist Share Product code: 400600 Category: Diamond point sets and bands. Tags: diamond bits, Dremel bits, glass, lapidary.