features: chamfered tool tips eliminate burrs and help tools seat in screw head sharp corners transfer more torque to the screw and reduce stripping precision machined for ease of use and superior fit specifications:metric hex end power bit singles packaged sizeinchmmpart#qtysingles standard length metric 2.53.0761035410 3.03.0761035610 4.03.0761036010 5.03.0761036410 63.0761036810 83.076103721 103.076103761