Standard 7-Piece Drill/Tap Bit Set, 1/4 in Max Cutting Diameter

Features : Complete hole drilling, tapping and deburring/countersinking in one operation with power drill | Back taper beyond tap to prevent thread damage from over-drilling | Deburr/Countersink also provided on bit beyond back tape | Made from high-speed steel vs. carbon steel for longer life | High quality hex shank to ensure strong connection to drill chuck | Designed to tap up to 10 gauge metal | Quick Change Adaptor included in both metric and standard kits