Related Products Diamond lap disk 6” PSA backing 100 grit $38.00 excl GST Diamond lap disk 6” PSA backing 60 grit. $38.00 excl GST Diamond twist drills 2.0mm dia. $2.50 excl GST Electroplated diamond core drill, 40mm dia. 10mm shank. $48.00 excl GST Quantity Add to cart Product added to wishlist. Add to WishlistProduct added! Browse WishlistThe product is already in the wishlist! Browse Wishlist Share TweetPin It Product code: 450040 Category: Core drills. Tags: core drills, Diamond drills, glass, glass work, lapidary.