Detail 23pcs/set 5 countersink countersink drill bits centering drill hinge wrench woodworking reamer chamfering drilling toolHeat treatment and hardened titanium nitrate coated high carbon steel provides excellent cutting powerOccasions: use on steel, aluminum and other metals, plastic or wood. The brass and high-speed steel hinge is durable and excellent to use. The sawdust will be automatically discharged from the top of the boreholes on both sides, not the blocked drill bit. Unique design and excellent punching effect. You can easily change Bit in different situations. Drill sleeve for precise positioning, will not move. These self-centering hinge drill bits are most commonly used in the installation of door hinge, cabinets, and other woodworking industries. Color: Silver + BlackMaterial: High Speed Steel + Carbon SteelPackage Contents: 7 x Reaming Bit Bits7 x Hinge Hole Core Drill Bits7 x Drill Bits2 x Hex WrenchOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.