Product Description Specifications countersink drill bit set, 3/8" dia x 1/8" drill diameter x 1/4" shank, 82 degrees, including a carbide-tipped countersink bit, M2 steel drill core with gold coating, free-spinning low-friction depth stop, and an anti-slip 1/4" quick-release hex shank, suitable for bench drills and hand drills. Adjustable Depth-Stop & Ball bearing for fine finish The countersink's adjustable depth stop can easily handle both shallow holes for flush screws and deeper holes to hide screws. The design maintains uniform depth for consistent drilling, preventing variations from pressure changes. The countersink drill bit with depth stop features a ball bearing that prevents scratches and burns, ensuring a flawless, scratch-free finish every time, eliminating the need for secondary polishing. Carbide-Tipped Blades The counter sink set features carbide blades, capable of drilling approximately 30,000 holes in solid wood (recommended RPM around 3,500). The center drill bit is made of M2 steel, coated with a golden finish for enhanced wear resistance, offering a lifespan 5 times longer than other countersink drill bit set for wood. Depth Control Design Drilling depth can be adjusted as needed to ensure satisfactory holes. The drill bits enable positioning and adjustment of drilling depth without removing the depth stop, allowing for quick bit changes. Ideal for Woodworker Our countersink bits is ideal for wood projects, designed for creating pet houses, cabinets, porch swings, bed frames, and more. Our carbide countersink bit easily pre-drills holes in softwood, hardwood, solid wood, plywood, MDF, chipboard, as well as plastics and aluminum, ensuring secure screw installation.