Specially designed for use on reversible portable drills, SST power taps tap faster and last longer than standard taps in steel, stainless steel and other ferrous or non-ferrous metals. SST power taps eliminate slow hand tapping to increase productivity and reduce overall tapping costs. •For use on: Mild steel; Non-ferrous metal; Stainless steel; •Drill bit and tap sizes marked on inside panel; •Panel is hinged and neatly fold into box; •SST high performance HSS Power Taps; •SST+ high performance HSS drill bits; •Sturdy metal index container; .