Drillco bridge reamer commonly used on bridgework, ship construction and structural steel fabrication where extreme accuracy of diameter is important. Reamers have pilot type points for alignment purposes and easy entry into small and off-center holes. High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance. Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge. 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. When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging.