1、Accurate Positioning: This drill bit can help you drill a guide hole accurately without moving, which improves the accuracy and efficiency of work. 2、Excellent Design: The unique chip removal holes on both sides of the drill tip will not cause wood chips to block the drill bit, so it works smoothly and quickly. 3、High Quality Materials: The hinge drill bit set is made of high quality high speed steel, durable, long service life, good wear resistance, good toughness, corrosion resistance, very practical. 4、Easy to Install: Simple structure, easy operation and installation. Just follow the instructions to change the drill bit quickly without wasting too much time. 5、Wide Application: Useful and accurate item for the installation of doors, wooden boxes, cabinets, wood decks and furniture. A convenience item for DIY and DIY projects. Item Type: Hinge Drill Bit Set Material: High Speed Steel Color: Silver Hole Size: Approx. 5/64 in: The diameter of the hole is about 2 mm / 0.07 in, using about 2.2 - 2.8 mm / 0.08 - 0.1 in self tapping screws 7/64 in: The diameter of the hole is about 2.8 mm / 0.1 in, using about 3 - 3.5 mm / 0.12 - 0.13 in self tapping screws 11/64 in: The diameter of the hole is about 4.5 mm / 0.18 in, using about 5 - 5.5 mm / 0.19 - 0.2 in self tapping screws 5 in: The diameter of the hole is about 5 mm / 0.19 in, using about 5.5 - 6mm / 0.2 - 0.23 in self tapping screws 13/64 in: The diameter of the hole is about 5.1 mm / 0.2 in, using about 5.6 - 6.1 mm / 0.22 - 0.24 in self tapping screws 1/4 in: The diameter of the hole is about 6.3 mm / 0.25 in, using about 6.8 - 7.3 mm / 0.26 - 0.28 in self tapping screws 9/64 in: The diameter of the hole is about 3.5 mm / 0.14 in, using about 4 - 4.5 mm / 0.16 - 0.18 in self tapping screws 8 x Hinge Drill 1 x Hex Wrench