Related Products Diamond lap disk 8” PSA backing, 180 grit. $50.00 excl GST Diamond saw blade 200 x 1.0 mm (8″) $40.00 excl GST Diamond saw blade 150 x 0.5mm continuous rim $30.00 excl GST 12mm diamond band mandrels $12.00 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.