Features: Crafted with durable hardmetal alloy, this countersink drill bits set ensures high precisions woodworking with sharpened steel blades for fast, clean holes in wood, plastic, and PVC. Featuring integrated ball bearing and depth stop collars, the drill bits prevent wood splintering while maintaining consistent countersinking depth for professional grade result. Ideal for woodworking professionals and DIY enthusiasts seeking reliable tool for cabinetry, furniture assembly, or craft projects requiring flush screw installations. Perfect for workshop tasks like installing hinges on wooden doors, assembling plywood structures, or crafting decorative wooden items needing concealed fasteners. The included storage case keep drill bits organized by size (2.8mm-4mm), ensuring quick access and protecting carbide tipped cutting edges during transport or job site use. Specifications: Material: cemented carbide steel, steel Color: As pictures shown. Optional Type: 5pcs(5 countersink drill bit), 6pcs(5 countersink drill bit and hole punch) Size: As pictures shown. Package Includes: 5pcs/set: 5pcs countersink drill bit with storage case 6pcs/set: 5pcs countersink drill bit and 1pc hole punch with storage case note: Please allow 1-3cm error due to manual measurement. please sure you not mind before you bid. Due to difference between different monitors, the picture may not reflect the actual color of the item.