Precise Half Round H.S.S. Jobbers Length Twist Drill, Size 5/16″, .3125″ Decimal Size, 4-1/2″ Overall Length

• H.S.S. – High Speed Steel
• Hardness: 58 to 60 RC
• 118 point angle
• Series: A51
• Bright finish drills can be used in a wide range of materials
• For drilling operations in soft materials that can frequently clog the standard helical flutes with chips.
• For use on soft non-ferrous metals such as brass, copper, and soft aluminum. Non-metallic materials, such as rubber, fiber, and paper may also be machined with these drills.
• May be used with hand held manual drills and either portable or stationary machines.
• Greater chip clearance for deep drilling.
• Finer finish at higher cutting speeds.
• Greater accuracy by minimizing off center problems and drill run-off in deep holes.
• Shank Style: Straight Shank
• Cutting Direction: Right Hand
• Workpiece Material Range: Non-Ferrous, Cast Iron, Plastics
• Country of Origin: U.S.A.

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