Quick Change 5 Piece Countersink Drill Bit Set by Snappy. Combination countersink and/or counter bore for standard wood plugs with standard hex shank will fit all power bit quick change chucks. Made of alloy steel & thru hardened with a 82 degree countersink angle. The drill bits are adjustable for different length screws with a 3/8" or 1/2" diameter counter bore. Your drill will not slip when using large 1/4" socket head screws. Made in USA by Snappy.

• In one step, you can drill, countersink and counter bore the perfect sized hole for #4, #6, #8, #10, or #12 screws.
• Snappy Tools Countersinks will drill the pilot hole and countersink or counter-bore for screws in one step. Countersink to drive the head of the screw flush with or slightly below the surface
• Ideal for plugs or dowel buttons. The 1/4" hex shank can be used with power drills and quick-change chucks.
• Experience the higher quality of Snappy Tools. Combining higher quality materials and patented technology, Snappy delivers industrial quality tools to the tradesman and do-it-yourself markets at an affordable price.
• Made in USA by Snappy; Includes 5 Gold Screw Countersinks: 5/64x3/8, 3/32x3/8, 7/64x3/8, 1/8x3/8 & 9/64x1/2 B000XXZME8