These Self-centering Drill Bits put hinges in the center where they should be. It comes with the four of the most often used sizes of carpenters, mainly for cabinets, furniture makers, and other wood working trades. It is easy to use and install and will give positioning accuracy without shifting. The chips will automatically discharge from the hole on either side of the drill and will not get stuck in it.
· Color: Silver
· Material: Brass, HSS
· 5/64'': Hole diameter is about 2 mm, Use about 2.2 - 2.8 mm tapping screw
· 7/64'': Hole diameter is about 2.8 mm, Use about 3 - 3.5 mm tapping screw
· 9/64'': Hole diameter is about 3.5mm, Use about 4 - 4.5 mm tapping screw
· 11/64'': Hole diameter is about 4.5mm, Use about 5 - 5.5 mm tapping screw