The EZARC 5pcs Countersink Drill Bit Set is a must-have for woodworking enthusiasts and professionals. This set includes #4, #6, #8, #10, and #12 titanium-coated HSS drill bits, designed for fast and precise drilling, countersinking, and deburring. The adjustable depth feature allows you to customize the pilot hole for various wood thicknesses, ensuring a perfect screw fit every time. The set also includes 5 replaceable drill bits, a magnetic bit holder for extended reach, and an Allen wrench for easy adjustments. Compatible with hand drills, bench drills, and electric drills, this versatile kit delivers efficiency and smooth results on both softwoods and hardwoods.