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