Item : 1-3/8" (35mm) Vacuum brazed diamond Dry drilling bits Specification: Diameter 35mm (1 3/8), 5/8-11 Thread (connection), Total length 60MM, Diamond height 15MM Quantity: 1pc Application : Dry/wet drilling for porcelain tile, granite, marble, stone, Masonry, brick... Feature: 1.Fast and Smooth drilling 2.Long lifetime 3.Less Chipping 4.Minimizing any breakage 5.Less loss of material 6.Less heat generation 7.Better finish quality ====================The End ====================