3pcs Quick Change 6.35mm Adjustable Hex Countersink Drill Bit Set, includs 5 Woodworking Countersink Bits and5 Replaceable Bits & 5 Wrenches, for Wood - 2.8-4mm Tapered Drill Bit (Hexagonal)

• 【3-Size Precision Set with Built-in Depth Limiters】 This targeted countersink drill bit set includes 3 pieces (8mm bore) exclusively tailored for 3mm, 3.2mm, and 3.5mm screws—no redundant sizes to sort through. Integrated depth limiters lock in flush screw finishes every time, eliminating over-drilling that ruins wood, plastic, or MDF workpieces, perfect for furniture making and DIY projects.
• 【Rustproof Hardened Steel for Long-Lasting Sharpness】 Crafted from high-strength hardened steel with a corrosion-resistant finish, these drill bits stay sharp, wear-resistant, and rust-free even in humid workshop environments. Durable depth limiters maintain precise control across repeated use, reducing slippage and breakage—more reliable than ordinary carbon steel bits, cutting down replacement costs.
• 【Tool-Free Adjustable Depth for Consistent Results】 Equipped with easy-tighten depth-stopping collars—no extra hex wrench needed—to customize drilling depths for different screw lengths. Simply twist the collar to lock in position, ensuring uniform countersinks across every hole, boosting work efficiency and achieving professional-grade installation results.
• 【Multi-Material Expert for Clean, Burr-Free Holes】 Designed to tackle softwoods, plywood, particleboard, acrylic, and MDF with effortless precision. Creates smooth, burr-free pilot holes and countersinks without splintering, making it a go-to for woodworkers, home repair, and DIY enthusiasts—no need to switch between specialized bits for different materials.
• 【1/4" Hex Shank for Universal Drill Compatibility】 Features a standard 1/4" (6.35mm) hex shank design, ensuring firm connection and quick installation on most electric drills, cordless drills, and bench drills. The integrated guide tip guarantees stable starts and vertical alignment, preventing bit bending and delivering precise straight holes—even for beginners. 【Drill-Friendly Design】Fits standard electric drills, hand drills, or bench drills. Includes a guide tip for stable starts and vertical alignment to prevent bending.

GSKQCRPR 3-Size Countersink Drill Bit Set with Depth Limiters 【Precision Trio Kit】 Contains 3 hardened steel countersink bits (3mm/3.2mm/3.5mm x 8mm bore) with calibrated depth collars. Engineered for creating perfect screw recesses in woodworking, cabinetry, and MDF installations. 【Aerospace-Grade Durability】 HSS-G titanium-coated drill bits maintain sharpness through 5000+ holes. Tempered steel limiters withstand 50N clamping force for zero depth deviation during repetitive drilling. 【Micro-Adjustable Depth Control】 Laser-etched limiter rings with 0.1mm precision allow exact depth matching for wood screws (#6-#8). Hex wrench included for tool-free collar adjustments in seconds. 【Multi-Material Mastery】 Drills clean pilot holes in softwoods, bamboo plywood, and ABS plastic. 135° split-point tip prevents walking on curved surfaces. Compatible with impact drivers and drill presses. 【Pro-Grade Performance】 Integrated chip flutes reduce heat buildup during extended use. Reverse-thread design automatically ejects wood chips for uninterrupted drilling. Meets ANSI B94.11M standards.