Features: Achieve flawlessly woodworking results with this carbon steel countersink drill bit set featuring an adjustable depth stop that prevents accidental surfaces damage and ensures precise 3.2–4.8mm holes every time. The set includes tapered drill bits made from wear resistant carbon steel, depth adjustment rings for quick settings, and comes organized in a protective hard case with individual slots. Ideal for both enthusiasts tackling home renovations and professional woodworkers requiring reliability precise tool for furniture assembly or appliance installations. Perfect for creating clean, controlled countersinks in delicate wood surfaces during cabinet making, door hinge installations, or any project demanding accurate depth drilling without surfaces scratches. Enhances your workshop efficiency with this durability, portable set that combines professional construction with user friendly features like rapid bit changes and secure component storage. Specifications: Component: alloy, plastic Packing Size:Approx.20.4x15.2cm/8.03x5.98inch Option Color:Yellow,Blue; Shank:6.35mm/ 1/4inch Length:88-104mm/3.46-4.09inch Center Bit Diameter:3.2-4.8mm Applicable scenarios: aluminum-plastic composite panels, melamine boards, woodworking veneer panels. Package Includes: 1pc Counterbore Drill 5pcs Center Drill Bit 1pc Screw Drill Bit 5pcs Drill Bit 1pc Wrench note: Please allow 1-3cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.