5/8 inch Bridge Reamer 1/2 inch Shank Bridge Tapered Reamer High Speed Steel Spiral Flute Drill Bit Chamfer Enlarge Hole America. Feature: Bridge reamers are used to align existing holes before installing bolts or rivets. Design: Tapered design allows access to overlapping holes. Easy to Use: The short length is convenient for use in areas with limited access. Application: High-speed steel is suitable for various materials, such as aluminum, brass, bronze, cast iron, copper, iron, metal, nickel, plastic, steel. Material: Excellent HSS material, fine workmanship, strong and durable. Specification: Certification: CE, Origin: Mainland China, Type: Bridge Reamer, Model Number: Tapered Reamer, Reamer diameter: 5/8", Shank diameter: 1/2", Material: HSS, Overall length: about 160mm/6.3in