35540 Type 221-P Heavy-Duty Parabolic Flute Taper Length Black Oxide Tang Drive 135Â degree Split Point Drill Bits 4.25mm • Black oxide surface finish

• Black oxide surface finish increases wear resistance and adds lubricity to improve chip flow

commonly referred to as "pin and block" type

castings and other hard metal drilling applications

Flexeel Reinforced Polyurethane

35540 Type 221-P Heavy-Duty Parabolic Flute Taper Length Black Oxide Tang Drive 135Â degree Split Point Drill Bits 4.25mm • Black oxide surface finishParabolic flute drills are designed to eliminate the need for frequent drill retraction when deep hole drilling in low to medium tensile strength materials. The split point and heavy duty design provide superior performance by permitting higher feed rates and continuous drilling of deep holes. Click Here for product catalog Proudly Manufactured in the U. S. A