5-pc Countersink Drill Bit Set, 3in1 Woodworking Counterbore Hole Drill Bits for #6 8 10 12 16 Screws, Depth Adjustable M2 Pilot Drill Bits, 82-Degree Chamfer, 1/4” Hex Shank, 2 Allen Wrench 5 Piece Countersink Bit Set (#6 #8 #10 #12 #16)

A 5-piece, 3-in-1 countersink/counterbore set for common screw sizes (#6–#16), featuring M2 HSS pilot bits, an 82° chamfer, and a depth-adjustable counter sleeve with 1/4″ hex shanks for quick changes.