Features 【High-Speed Steel Material】: The 8pcs hinge drill bit set is made of high-speed steel material, with high hardness, robustness, durability, excellent drilling performance, and is the centring guide for the pre drilling required. 【Double Sided Hole Design】: This self centering drill bit with double sided hole design, which quickly and automatically discharges sawdust from both sides of the hole, with no drilling blockage, helping to save time in removing. 【Easy to Use】: The hex shank hinge drill bit is easy to use and operates seamlessly. This self centering feature ensures that the drill bit is perfectly aligned, making it easy to create accurate holes. 【Stable Operation】: This hinge drill bit guide set has a hex shank that fits securely into the drill chuck, ensuring a stable and wobble free operation. You can use it with confidence! 【Widely Application】: Our hole opening drill bit is suitable for urniture, kitchens, woodworking, window door etc, different hardness wood needs different self centering drill. Widely used for opening holes in wood, plastic, thin iron plate, thin aluminum plate, etc. Specification: Item Type: Self Centering Hinge Drill Material: 35 steel hex shank, bearing steel drill bit Features: Accurate positioning, automatic discharge of wood chips from the hole at the top of the drill bit, no jamming of the drill bit Use: The hinges are fixed to the doors and window by screws, and the hinge hole cutter is used to make holes for the hinge screws, the drill sleeve can better fix the position and improve the drilling efficiency. Package List: 8 x Self Centering Hinge Drill 1 x Hex Wrench Package List 8 x Self Centering Hinge Drill 1 x Hex Wrench