Drill America DEWCBR Series Qualtech High-Speed Steel Counterbore, 3 Morse Taper Shank, 5/16" Pilot, 6-3/8" Length, 1-1/8" Size High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance Morse taper shank allows the tool to be inserted directly into the machine's spindle to facilitate high-torque applications such as large cut diameters Counterboring is the enlargement of a portion of a hole that has previously been formed The counterbore is a two-piece construction, having an integral shank and counterbore-cutter, and a pilot that is interchangeable, which provides flexibility in the use of the tool 1-1/8-inches size Product Specifications Part Number DEWCBRTS1-1/8 UPC 887861130059 Cutting Diameter 1.125 inches EAN 0887861130059 Finish Type Uncoated (Bright) Material High-Speed Steel Measurement System Inch Model Number DEWCBRTS1-1/8 Shank Type Round Size 1-1/8" Style Interchangeable Pilot