Brand: RUKO Item: Drill bit Replacement: No Material: High-speed steel (HSS) Quantity per Pack: 10 Application: Hole cutting Finish: Bright Overall Length: 4.5in (114mm) For Use On: Aluminum, brass, plastic, steel, bronze and cast iron Drill Bit Type: Jobber-length Drill Bit Size: 5/16in Point Cut: Split Shank Type: Round Point Angle: 118 degrees Flute Length: 3-3/16in Flute Angle: 25-30 degrees RUKO jobber-length drill bit, 5/16in, split point, high-speed steel (HSS), bright finish, round shank. Package of 10.