4pcs Hex Shank Self Centering Drill Bit Set Door Window Hinge Hole Puncher Woodworking Tool

Description: This is a self centering drill bit set for drilling holes for door or window hinge s installation. It helps to position accurately, easy to connect with electric drill and use, making your drilling precise and smooth. Features: Adopting brass body with high speed steel drill bit, high strength and hardness, durable in use. Quick to change drill bit by one hand operation. Comes with 4 drill bits of the most common sizes for carpenter: 5 64 , 7 64 , 9 64 and 11 64 . Features accurate positioning, effectively improve drilling efficiency. The wood chips will auto discharge from the top hole so the drill won t get stuck. Specifications: Condition: 100percent Brand New Material: Brass + High Speed Steel Color: as Shown in the Picture Specification Length Hole Diameter T apping S crew 5 64 8.6cm 3.39in 2mm 2.2 2.8mm 7 64 8.9cm 3.50in 2.8mm 3 3.5mm 9 64 10cm 3.94in 3.5mm 4 4.5mm 11 64 10.2cm 4.02in 4.5mm 5 5.5mm Quantity: 4 Pcs Weight: approx. 110g Package Included: 1 x 4pcs set Door Hinge Drill Bit 1 x Hex Wrench