5pc Power Groove Countersinks 3/32, 7/64,1/8

Pre-drill and countersink to drive screws flush with the material surface or deep hole counter boring for driving screw heads below the surface. Ultra-sharp cutting flute clears chips efficiently and leaves a clean, smooth hole. Adjustable drill bit length for desired screwed depth, and features a flattened shank for a no-slip countersink connection.
Precision made for drilling accuracy and high-torque driving applications.  Get jobs done easier, faster and with professional results. Also, a great woodworking tool and companion set with the Montana Brand Self-Centering Plug Cutters

• Countersink or counter bore clean, smooth holes for screws and fasteners
• Power groove 1/4" hex shank is quick change and impact drill/driver compatible
• Allen wrench for drill bit depth adjustments and replacement
• For use in wood and plastic
• Made in the USA

Set includes 

Sizes: #6, #8, #10, #12