176488 Disston Company 176488 Master Mechanic, 59/64, Silver Deming, High Speed Steel, Black Oxide, 6, Jobber Length, 1/2 Reduced Shank, 3-1/8 Flute Length, 135 Degree Split Point, Black Oxide Surface Finish Improves Chip Flow Increases Abrasion Resistance, Recommended For Drilling Wood, Plastic Soft Metals, Used In Machine Shops Using Screw Machines Or Where The Maximum Chuck Capacity Is 1/2, Carded.