These drill bits have a 1/2" reduce shank to expand the size range capacity of a portable drill chuck and has common flute and overall length for minimal adjustment during tool changes. Drill Bit Information: A dependable, general purpose high speed steel drill bit ideal for production, maintenance or portable drilling jobs. Drill America Tap and Drill Bit Kit in Pouch Case. Hand Taps are the most versatile taps for hand use and are popular for general machine tapping.
They are surface treated with abrasion-resistant black oxide and made of high speed steel with a 118̡̉ conventional point. Drill Bit Information: A dependable, general purpose high speed steel drill bit ideal for production, maintenance or portable drilling jobs. These drill bits have a 1/2" reduce shank to expand the size range capacity of a portable drill chuck and has common flute and overall length for minimal adjustment during tool changes..