Dewalt DT4767 Extreme Impact Flatwood Drill Bit 18mm x 152mm The Dewalt DT4767 flat wood drill bit has an 18mm cutting diameter and is 152mm in length. These drill bits are designed for drilling wood materials such as chipboard, softwood and hardwood. Other features include a robust steel shank for increased durability and chamfered outer cutting spurs for clean, precise drilling. Features: Ideal for door locks, electrical and plumbing work Specification: Cutting Diameter: 18mm Length: 152mm Pack Quantity: 1