13 Piece HSS-Co5 Cobalt Drill Refill Set Fully heat treated for increased

Fully heat treated for increased durability

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

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13 Piece HSS-Co5 Cobalt Drill Refill Set Fully heat treated for increased13 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