Related Products Electroplated diamond core drill, 8mm dia. 8mm shank. $13.00 excl GST Thin premium lapidary blades 150 x 0.5 mm $65.00 excl GST Resin diamond belt, 6″ x 1.5″ (150 x 37mm) 140 grit $40.00 excl GST 6″ lap backing plate with one threaded adapter $125.00 excl GST Quantity Add to cart Product added to wishlist. Description One 6″ lap backing plate with one threaded adapter. 5/8″ and 3/4″ right hand threaded adapters in stock, but 1″, 1/2″ right hand and 1″, 3/4″, 5/8″ and 1/2″ left hand thread can be ordered. Reviews (0) Add a Review Add to WishlistProduct added! Browse WishlistThe product is already in the wishlist! Browse Wishlist Share Category: Tools. Tags: diamond tools, Grinding wheels, lapidary, laps.