Bosch Extra-Length Aircraft Twist Drill Bit – 7/16-in Dia x 12-in L – 135° Split Point – Black Oxide – Round Shank

Use this Bosch drill bit with a split point that eliminates the need for a centre punch. With its helix design, the bit offers reduced heat and extended battery life. The triple-tempered design lasts 50% longer and allows the bit to reduce friction. This metal drill bit is versatile since it can cut into metal, wood and plastic.