Description: 17Pcs Woodworking Hinge Drill Hexagonal Shank Self-centering Drill Bit Set For Door and Window Derailment HolesSpecifications:Product NameSelf-centering Hinge Drill Bit MaterialHigh-speed SteelShank Size1/4-Inch Hexagon ShankCenter Drill Bits Size5/64', 7/64'', 9/64'', 11/64''*2, 13/64'..