Countersink Drill Bit Set with Depth Stop 4PCS, HCS Four Blades Countersink Bits with Adjustable Depth Stop and L Shape Wrench, Wood Countersink Bit Set for Wood, Plastic, Woodworking. 【Set Includes】Our premium 4-piece Countersink Drill Bit Set features M2 HSS tapered pilot drill bits in sizes 7/64″×3/8″, 1/8″×3/8″, 9/64″×3/8″, 5/32″×3/8″.