Premium USA-Made Norseman HSS Cryogenic Drill Bit Set - 5/16" Split Point Jobber Length (5-Pack) for Metalworking, Woodworking & DIY Projects

Superior to Cobalt bits, cryogenic treatment drill bits are the latest cutting edge technology! Cryogenic treatment creates a more uniform "grain" structure by transforming retained austenite into martensite. Modified carbon micro-structure through precipitation of carbides makes these bits extremely sharp and resistant to wear. Norseman CN-Tech Drill Bits are cryogenically frozen to -300 degrees fahrenheit for 48 hours, which reduces the brittleness of the drill bits, increasing strength and decreasing the chance of the bit shearing.

Type 190-CN High Speed Steel CN-Tech Jobber Length Bits - 5 Pack

Cryogenic treatment results in longer tool life and makes the bits harder and stronger

Three flats ground onto sides of shank to reduce the slippage of the bit when used in drill chucks

Precision ground points, flutes, body, clearance and drill diameter for accurate and precise cutting

135 Degree Split Point - USA MADE