#47 x 12" HSS Aircraft Extension Drill Bit, DWDA/C Shopify Collective They are made from M42

They are made from M42 8% cobalt and are manufactured to NAS 965 Type "D" specifications

Part Number: 31F3600ROD2Z

Part Number: 100C550HCS8Y

Part Number: Assortment Kit #403527 Pieces - Coarse Thread

Length 17-3/8"

#47 x 12" HSS Aircraft Extension Drill Bit, DWDA/C Shopify Collective They are made from M42Product Description A dependable, general purpose high speed steel drill bit ideal for production, maintenance or portable drilling jobs. They are for use in a wide range of materials such as aluminum, brass, copper, metal, plastic and wood. They are surface treated with abrasion resistant black oxide and made of high speed steel with a 135 split point tip for fast penetration and accurate drilling. Ideal for drilling where extra length for reach is