Michigan Drill 535R Series High-Speed Steel Aligning Reamer, Left Hand Spiral Flute, Round with Flats Shank, Black Oxide Finish, 5/16" Size

Michigan Drill 535R Series High-Speed Steel Aligning Reamer, Left Hand Spiral Flute, Round with Flats Shank, Black Oxide Finish, 5/16" Size

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 These round shank tools have flats ground onto three sides to reduce slippage of the bit when used in drill chucks Reverse (left hand) spiral flute tools push chips forward into the cut as they work, so they won't pull thin material towards the tool as it cuts and are useful for interrupted cuts such as keyways Right-hand cut tools have a cutting action that engages when they are run in a clockwise direction