The Bosch 2607002778 HEX-9 Multi Construction Drill Bit, for drilling practically any material The Bosch 2607002778 HEX-9 drill bit is ideal for drilling practically all materials including concrete, brick, wood, plastic and more. The 1/4\" shank provides optimum power output whilst the carbide centring tip ensures a precise start-up and good control. This model is extremely durable thanks to its diamond ground cutting edges. Features: 1/4\" hex shank for optimum power transfer Diamond-ground cutting edges for wear-resistant The carbide centring tip ensures a precise start-up and good control when drilling Suitable for drilling practically all materials including concrete, brick, wood, plastic, thin sheet metals, ceramic and tile Specification: Pack Qty: 1 Diameter: 7mm Overall length: 100mm Working length: 50mm