Features: 1The positioning accuracy is high, it will not move, and the chip will be automatically discharged from the holes on both sides of the upper of the drill bit without jamming the drill bit. 2These hinged drill tools are made of aluminum alloy, which is strong and durable. 3The hinge drills are simple in structure, easy to operate and easy to install. Come with different specification of drill bot to satisfy your needs. 4Widely used in woodworking door and window hinges, it will be automatically removed from these 2 side holes. 5This aluminum alloy hinged drill has a hex handle with a incisive bit and a long service life. Item Type: Hinge Drill Bit Material: Aluminum alloy Specification: 5/64in7/64in9/64in9/64in11/64in5in13/64in1/4in A twist drill for each hinge drill Hole Size: 5/64in: Hole Diameter: Approx. 2mm / 0.1in, Self-tapping Screw: Approx. 2 ~ 2.8mm / 0.1 ~ 0.1in 7/64in: Hole Diameter: Approx.2.8mm / 0.1in, Self-tapping Screw: Approx. 3 ~ 3.5mm / 0.1 ~ 0.1in 9/64in: Hole Diameter: Approx.3.5mm / 0.1in, Self-tapping Screws: Approx. 4 ~ 4.5mm / 0.2 ~ 0.2in 9/64in: Hole Diameter: Approx.3.5mm / 0.1in, Self-tapping Screws: Approx. 4 ~ 4.5mm / 0.2 ~ 0.2in 11/64in: Hole Diameter: Approx.4.5mm / 0.2in, Self-tapping Screw: Approx. 5 ~ 5.5mm / 0.2 ~ 0.2in 13/64in: Hole Diameter: Approx.5.1mm / 0.2in, Self-tapping Screw: Approx. 5.6 ~ 6.1mm / 0.2 ~ 0.2in 1/4in: Hole Diameter: Approx.6.3mm / 0.2in, Self-tapping Screw: Approx. 6.8 ~ 7.3mm / 0.3 ~ 0.3in When opening the hole, please adjust it according to the hardness of the wood. If the wood is soft, you can choose the smaller one. If the wood is hard, you can choose the corresponding or the larger one. The wood chips will be automatically discharged from the holes on both sides of the drill. , The design of the drill bit will not be stuck, and the perfect punching effect. 8 x&nbspHole Opener 1 x&nbspHex Wrench 8 x&nbspDrill