drive:combination,philips,pozi,slotted thrtead:coarse,fine,wing teks head:pan,countersunk,wafer,hex washer,pan farming,bugle drive:combination,philips,pozi,slottedthrtead:coarse,fine,wing tekshead:pan,countersunk,wafer,hex washer,pan farming,buglematerial:c1022length:9.5-125mmfinish:black/gray phosphate / yellow/bule zinc plated wafer head self-drilling