Features For all applications in wood and wooden materials. Fast and precise cutting thanks to specially hardened pre-cutters. Extremely accurate centering without tear-out at the edge of holes. 1/4" hexagonal shaft prevents the drill bit from slipping into the drill chuck. Specification Suitable for use with: Beams Chipboard Hardwood Laminated Chipboard Plywood Softwood Veneered Wood Size - 6mm x 152mm KINDLY REMINDER: Delivery to the UK Highlands, Channel Islands, Northern Ireland, Isle Of Wight, Isle Of Man and the following postal code areas: BT, FK, KA (1-30), PA(1-49), PA(60-78),PA80, PH, PH(11-40), PH(41-44), PH(49-50), AB, IV, KW, ZE, GY(1-10), JE(1-5), PO(30-41), IM, IR, HS are excluded from our standard delivery charge and may incur extra costs.