FeaturesCombination drill and tap bit set, featuring one piece design bits that drill, tap and deburr in one operationSave time, drill, tap and deburr in one operation1-piece drill/tap guarantees proper drill for tap sizeTapered design prevents thread damage from over drillingMade of high-speed steel for durability1/4 in quick change adapterSelf-feeding screw tip draws bit into surface for a clean, fast cut