... 13pc HSS Twist drill set , material : COBALT,HSS 9341,HSS4341,HSS4241,high carbon steel Product DescriptionPower tool accessories, drill bits series, We ... are producer of drill bit series as electrical hammer drillbits, ... bit sets. 13-pc H. S. S. TITANIUM TWIST DRILL SET: Point Angle: 118/135 material : COBALT,HSS 9341,HSS4341 ...