Product Name: Vacuum Brazed Diamond Drill Core Bits Sets hole saw and Diamond Saw Blade for Porcelain Tile Marble Quantity: 8pcs/kit Note: Kit Contains:6pcs(25/35/45/51/65/76mm)drill bits and 1pc 20mm finger bit and 1pc 4.5"/115mm diamond saw blade, totally 8pcs/box Specification: 1, Diamond core bits: Diameter 25/35/45/51/65/76mm; 5/8"-11 connection;total length 75mm; diamond height 15mm; max working depth 50mm; 2, Diamond finger bits: Diameter 20mm; 5/8"-11 connection; total Length 65mm; workable length 50mm; grit #50/60; 3, Diamond saw blade: Diameter 4.5"/115mm;Bore 22.23mm, Diamond height 10mm; Thickness 1.2mm;Grits #60/70 Application: 1. Drill Bit: Dry/wet drilling for porcelain tile, granite, marble, ceramic; 2. Finger Bit: Enlarge, shape and/or round bevel existing holes in Porcelain, Hard Ceramic, marble and granite 3. Saw Blade: For ceramic porcelain tile marble cutting Feature: Dry or wet drilling Vacuum brazed technology provides longer working life, Fast and smooth drilling Less chipping, minimizing breakage, less heat generation, better finish quality ===============end======================