The FISCH Wood Drill Bit and Countersink Set is specifically designed for the discriminating woodworker that needs to simultaneously countersink and drill holes in soft and hard woods. The adjustable bit allows the user to match the depth of the hole to the desired screw lengths. The FISH Double Flute Brad Point Wood Twist Drill is a premium high performance bit that is manufactured from High Speed Steel. With the aggressive design of the brad point bit, you can ensure a fast and easy cutting of wood before the hole is drilled. With its beveled edge design, you can achieve perfect drilling and countersinking without any deviation. Set includes 4 combination bits: 1/8-Inch-3-mm, 5/32-Inch-4-mm, 3/16-Inch-5-mm, 1/4-Inch-6-mm.