Description These self centering bits are great for drilling perfectly centered holes in hinges, hardware, or any time that you need accurately placed holes. Unique design and for DIY person and professionalist. Great for drilling perfectly centered holes in hinges, hardware, or any time that you need accurately placed holes.-door hinge drill bits Features - Colour: As shown.-door hinge hole drilling bit - Material: aluminum - Size: 12 x 8.5 x 1.5cm - Hinge screw size: 5/64'', 7/64'',9/64'',11/64'', 5"， 13/64", 1/4"-tool drill bit - Unique design and for DIY person and professionalist.-centering hinge drill bit - Positioning accuracy withnot shift. It can discharge automaticly that the chips fall from the of the drill hole and go out from either side of it. The Drill bits won't be stucked.-self-centering drill bit assortment - Great for drilling perfectly centered holes in hinges, hardware, or any time that you need accurately placed holes.-centering drill bit Specifictions - The 5/64", placed hole diameter is about 2 mm, is great suitable for 2.2-2.8 mm tapping screw-self-centering drill bits - The 7/64", placed hole diameter is about 2.8 mm, is great suitable for 3-3.5mm tapping screw-door self-centering hinge drill - /64", placed hole diameter is about 3.5 mm, is great suitable for 4-4.5 mm tapping screw-hinge hole drilling tool - The 11/64", placed hole diameter is about 4.5 mm, is great suitable for 5-5.5 mm tapping screw-center drill bits - The 5", placed hole diameter is about 5 mm, is great suitable for 5.5-6 mm tapping screw-cabinet drill bit - The 13/64", placed hole diameter is about 5.1 mm, is great suitable for 5.6-6.1 mm tapping screw-cabinet hinge drill bit - The 1/4", placed hole diameter is about 6.3 mm, is great suitable for 6.8-7.3 mm tapping screw-hinge drill bit set drill bit for installing hinges-Positioning accuracy withnot can discharge automaticly that the chips fall from the of the drill hole and go out from either side of it The Drill bits won't be stucked -hinge centering drill bits pcb drill bits-Great for drilling perfectly centered holes in hinges, hardware, or any time that you need accurately placed holes-carpenter positioning drill bit drilling woodworking hinge-Hinge screw size: 5/64'', 7/64'',9/64'',11/64'', 5"， 13/64", 1/4" -cabinet hinge hole guide self-centering drill bit-Unique design and for DIY person and professionalist -door hinge adjustment tool set positioning hinge hole punch-7 x Hinge Drill Bit-center hole drill bits