Drill America 1/4 x 12 HSS Aircraft Extension Drill Bit
 
A dependable, general purpose drill bit ideal for production, maintenance or portable drilling jobs
For use in a wide range of materials such as aluminum, brass, copper, metal, plastic and wood
135° split point tip for fast penetration and accurate drilling
Surface treated with abrasion-resistant black oxide
Round shank for use in a wide range of tool holding systems