Product Name: Vacuum Brazed Diamond Drilling Core Bits Sets hole saw for Porcelain Tile Quantity: 8pcs/kit Kit Contains:8pcs(19/25/35/51/76mm) drill bits,1pc 50mm Chamfer Bit,1pc 20mm Milling Bit ,1pc 5 8-11 SDS Adapter, Specification: Diamond core bits: Diameter 19/25/35/51/76mm;5/8"-11 connection;total length 75mm; diamond height 15mm; max working depth 50mm; Diamond Chamfer Bit: Diameter 35mm; 5/8"-11 connection; total Length 45mm; workable length 35mm; Grit #80 Diamond Milling Bit:Diameter 20mm; 5/8"-11 connection; total Length 65mm; workable length 50mm;Grit #50/60 5 8-11 SDS Aapter: total Length 72mm. Feature: Dry or wet drilling Having wide application: for Porcelain Tile Granite Marble Stone Masonry Brick Multifunction:Easy enlarging, beveling or shaping the holes. Vacuum brazed technology provides longer working life, Fast and smooth drilling Less chipping, minimizing breakage, less heat generation, better finish quality