The 4mm bosch cyl-9 soft ceramic tile drill bit is a good step up from the smallest size when you need a slightly larger hole in soft ceramic tiles. It suits smaller fixings where a little more clearance is required. Built for professionals, this hardwearing bit drills soft ceramic tiles without lubrication or cooling. Always drill in rotary mode, at low speed. Its sharply ground tip is designed for fast drilling with no skating, so holes start cleanly and accurately. The cylindrical shank fits three-jaw drill chucks for easy use with your current drill. Features and benefits: long life drilling in soft ceramic tiles sharply ground tip designed for fast drilling with no skating cylindrical shank compatible with three-jaw drill chucks no lubrication or cooling needed