Diamond segment tip reduces cutting temperature for 10x longer working life Diamond composite technology enables the bit to be dressed for optimum performance Wide slotted design for increased visibility while cutting and fast plug removal Ideal for wet or dry drilling: Porcelain, ceramic, granite, marble, limestone, slate, terracotta, fibreglass, travertine and masonry Bonus dressing stone with detailed instructions Cut depth: 30mm Shank: 1/4"" quick change Suits: Non-hammer action portable power drills Cutting speed: 1,000 RPM Other sizes available: 6, 8 & 12mm