SpeedLoad+ 5-Piece Power Groove Countersink SetRYOBI introduces the SpeedLoad+ 5 Piece Power Groove Countersink Set. This set gives you what you need to set screws flush with or below the surface of a material. Use this set with the RYOBI 1 4 in. Hex Shank Speedload+ Chuck. The Power Groove Countersink Set (5 Piece) includes four countersinks and a hex wrench for changing or tightening the drill bit in each countersink. California residents see Prop 65 WARNINGS Use with the RYOBI 1 4 in. Hex Shank