DOETYD 5 PCS countersink drill bit Set 8mm Shank Diameter Quick Change Adjustable Drill Bits

Complete Set: Includes 5 countersink drill bits (2.8mm, 3mm, 3.2mm, 3.5mm, 4mm), 5 replaceable bits, and 5 Allen wrenches for easy adjustment. Durable & Sharp: Made with high-speed steel blades and a sturdy 45# steel base for fast, precise drilling and long-lasting use. Adjustable Depth: Detachable design with hex wrench lets you adjust countersink depth to fit screws of various lengths efficiently. Dual Drilling Methods: Allows drilling both surface and through holes, creating clean, professional finishes on wood. Versatile & Compatible: Perfect for wood, MDF, plastic, and more; fits most electric drills, hand drills, and bench drills (not for glass, metal, concrete).