COMPLETE WOODWORKING KIT: The CLEVEROOL 16PCS set includes 5 tapered drill bits (7/64", 9/64", 11/64",3/16", 7/32"), 4 wood plug cutters (1/4", 3/8", 1/2", 5/8"), 2 screwdriver bits, 1 allen key, 1 adapter, and a durable storage box, ensuring you have everything needed for your woodworking projects. ADVANCED MATERIAL: Crafted from M2 Cobalt HSS, our countersink drill bits are nitride-treated for superior durability, offering 40% higher wear resistance than standard HSS. The polished spiral flutes enhance chip removal, significantly reducing the risk of breakage and doubling the tool's lifespan. HIGH EFFICIENCY DESIGN: Features a 1/4" hex quick-change adapter for easy bit switches. Adjustable pilot drill and counterbore depths, controlled with the included wrench, allow for precise, efficient drilling, countersinking, and counterboring in one go. VERSATILE USE: Compatible with various drilling tools including impact drills, hand drills, and bench drills. The 1/4" hex shank fits universally, making these bits ideal for numerous woodworking tasks such as building cabinets or crafting furniture. CUSTOMER COMMITMENT: We are committed to providing high-quality tools and include a robust storage case for organization and portability. Each set is designed for convenience and longevity, ensuring satisfaction and confidence in your purchase. Color: As Shown Material: Metal Package Contents: 1*hex shank drill bits