Irwin Turbomax high speed steel twist drill bit, 5/16" diameter, in the standard jobber length. The self-centering tip starts cleanly and quickly without a center punch, and the Turbomax line is built primarily for high-performance drilling in sheet metal while also working well in wood and plastic.

• Bit diameter: 5/16"
• High speed steel with a black body and gold flute
• Self-centering tip for clean, fast starts
• Jobber length: 4-1/2" overall, 3-3/16" flute
• Three-flatted shank for a better chuck grip (used on 3/16" and above)
• Drills wood, metal, plastic and sheet metal
• Manufacturer model: 73320