Related Products 12″ economy sintered continuous rim lapidary blade. 300 x 1.2mm $90.00 excl GST Sintered diamond point, ball shape 4mm dia, 3mm shank $20.00 excl GST Quantity Add to cart Product added to wishlist. Description Sintered diamond point 4mm dia, 3mm shank. 120 grit Will last at least 5 times longer than the same electroplated tool. Must be used wet. Reviews (0) Add a Review Add to WishlistProduct added! Browse WishlistThe product is already in the wishlist! Browse Wishlist Share Product code: 400404 Category: Diamond point sets and bands. Tags: diamond bits, diamond points diamond bits, diamond tools, Dremel bits, glass work, lapidary.