• SUPER PRIMALLOY CONSTRUCTION - The proven, heavy duty construction of our Super Primalloy Drills.
• MULTI-PHASE CRYOGENIC TREATMENT - Patented 24 hour deep thermal cycle brings drills down to -300°F, heats them to 400°F and then descends back to -300°F before a final warming.
• UNIQUE 137° SPLIT POINT - Advanced 137° split point geometry eliminates the need for center punching. Allows for easier penetration and increased life in high tensile materials.
• HYBRID DESIGN - Combines Industrial Length for increased reach with shorter Maintenance Length flutes for increased strength, rigidity and breakage resistance.
• STABILIZED MOLECULAR STRUCTURE - Multiple cryogenic treatments reduce brittleness and provide extended tool life.
• 2ND GENERATION SURFACE TREATMENT - Redesigned gold surface treated body provides excellent lubricity for increased drill life.
• MODIFIED FLUTE & WEB - Provides increased strength and durability.
• SUPER-TOUGH "M" SERIES ALLOY STEEL CONSTRUCTION - Superior tool steel provides exceptional wear resistance and longer life.
• FLATTED SHANKS - Virtually eliminates slippage in drill motor and prevents damage to the drill and the chuck.
• MADE IN THE U.S.A.

*Sizes #1 - #40 are Black and Gold; sizes #41 - #60 are Gold.
*Sizes #1 - #12 have flatted shanks; sizes #13 - 60 have un-flatted shanks.
*Sizes #1 - #40 are 137° split point; sizes #41 - #60 are 135° split point.