Draper 99791 Turbo Diamond Blade (300mm) Hardened and tempered diamond blade with continuous turbo rim for a fast cut and smooth finish. For use on granite, marble and stone. Suitable for dry and wet cutting, with optimum results when used wet. Compatible with most petrol saws with a 20mm bore. Diameter: 300mm Bore size: 20mm Segment height: 10mm Maximum speed: 5,100rpm Kerf: 3.4mm Blade construction: Sintered Weight: 1.17kg