P&N 3 Piece Countersink Bit Set This 3 Piece Rosehead Countersink Bit Set from P&N has a superior design and is a versatile tool that is perfect for countersinking/ counterboring screw holes into wood and plastic and is DIY quality. They can be used into both portable/ handheld corded or cordless drills as well as pedestal drilling machines. This set includes 3 of the most commonly used HSS Countersinks and are supplied in a handy plastic storage case for organisation and transportation.Manufactured from high quality carbon alloy steel for strength and durability this set represents great value. Since 1921, the P&N Brand has been providing cutting tools for the professional and serious DIYer, meeting the highest standards in precision and durability to achieve a better result. Today, P&N products continue to be made by craftsmen, backed by the Sutton Tools group.