Dormer A191 High Speed Steel Jobber Drill Bit Set, Black Oxide Finish, Round Shank, 118 Degree Conventional Point, 13 piece, 1.5 - 6.5 mm sizes (in 0.5 mm Increments) plus 3.3 mm and 4.2 mm

Key Features

• 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
• Round shanks allow use with a wide variety of toolholding systems
• When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging
• General purpose drills in plastic cases. The cases feature a transparent top, and euro-slot hanger.