OAL: __mm : 5mm Max RPM: ______ Shank: __mm Wax filled core aids cooling and lubricates, eliminating the need for water 5x Life: Diamond coated design reduces cutting temperature for 5x longer working life Vacuum brazed diamond tip Suits: non-hammer action portable power drills Ideal for: Porcelain, ceramic, granite, marble, limestone, slate, terracotta, fibreglass, travertine and masonry