13 Piece HSS-Co5 Cobalt Drill Refill Set High carbon steel solid core

High carbon steel solid core auger bit extension set

Equal diameter flanges must be fitted

For increased bit life use a cutting fluid/lubricant such as water or turpentine to reduce heat

25 Piece HSS Delta Point Bright Finish Drill Set in ABS Plastic Case

Bordo reduced shank HSS drills are ground and then a black finish is achieved by steam tempering

13 Piece HSS-Co5 Cobalt Drill Refill Set High carbon steel solid core13 Piece HSS Co5 Cobalt Drill Refill Set Bordo Fractional Cobalt Tough HSS Co5 Twist Drills. ANSI B94 11 135 Split Point (crankshaft point). Split point is self centering and the short distance from the drill axis to the outer corners results in faster penetration, reducing the need for end thrust. The 135 point should be used to cut harder steel materials especially in deep hole applications. In these situations it will produce thicker chips