Bosch Extra-Length Aircraft Twist Drill Bit – 1/2-in Dia x 12-in L – 135° Split Point – Black Oxide – Round Shank

Choose the Bosch drill bit to perforate materials such as steel and wood. It’s 12 in L x 1/2 in dia with a 10-in flute. With its black oxide coat, it’s durable and rust-resistant. Remove the need for a centre punch with its 135° split point, which avoids surface skating. The speed helix structure of this metal drill bit allows it to drill fast with low heating and long-term use.