The Milwaukee 1/2" x 12" Aircraft Length Black Oxide Drill Bit (48-89-2776) is a versatile bit ideal for deep drilling applications through metal, wood, and PVC. The black oxide coating provides lubricity and resists corrosion, while the 3-Flat Secure-Grip shank holds the bit firmly in the chuck. This versatile bit features extended length for hard to reach areas with a reduced shank diameter for use in 3/8" chucks.