Description: 100% Brand New & High Quality; These self centering drill bits put hinges right where they should be in ihe center 7 of the most often used sizes for carpenters, cabinet, furniture makers and other wood working trades; Easy to use and install; Positioning accuracy, will not shift, the chips will automatic discharge from the hole on either side of the top of the drill,not stuck drill; Professional drilling tool,applicable to the installation of door hinge; Specification: Material: High Speed Steel + Aluminum Size for each drill bit: 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; 5':Hole diameter is about 5mm,Use about 5.5-6 mm tapping screw; 13/64:Hole diameter is about 5.1mm,Use about 5.6-6.1mm tapping screw; 1/4 :Hole diameter is about 6.3 mm,Use about 6.8-7.2 mm tapping screw; Package Includes: 7 Pieces HSS Self Centering Hinge Drill Bits
