High-Quality 90 Degree 3/8" Body Countersink Drill Bit - 55321 - Perfect for Woodworking, Metalworking & DIY Projects

Condition: New

Cobalt steel countersinks are harder than high-speed steel countersinks and provide good wear when machining hard materials at high speeds. General purpose 3-flute countersinks are the standard choice for expanding the top of an existing hole in a variety of materials to ensure screws install flush with the surface of the workpiece. Three-flute countersinks often provide better chip and perform better when machining stringy materials than countersinks with more flutes.

Countersinks expand the top of an existing hole in a workpiece to ensure screws install flush with the surface of the workpiece. This helps the workpiece material from swelling when a screw is installed in the hole and tightened down in metalworking applications. Countersinks can also be used to debur holes for a smooth finish. Countersink, 90 Degrees , 3/8 in, Cobalt, Bright (Uncoated)