*Precise Depth Control: The adjustable depth stop feature automatically regulates drilling depth, effectively any accidental penetration that could damage surfaces during woodworking tasks.*Quick Adjustment Mechanism: With a rotating depth adjustment ring, this drill bit set allows for tool-free depth setting, enabling you to achieve precise adjustments swiftly and efficiently, enhancing overall work productivity.*Versatile Size Options: This set includes a variety of tapered drill bits ranging from 3.2mm to 4.8mm, catering to different screw sizes and making it perfect for diverse applications in woodworking, renovation projects, and appliance assembly.*Construction: Crafted from high-strength carbide steel, these drill bits are engineered to be wear-resistant and heat-resistant, long-lasting sharpness and performance throughout their use, even under demanding conditions.*Organized Storage Solution: The set comes with a portable blue hard storage box that features dedicated slots for each component, keeping drill bits and tools organized, dust-free, and easy to transport for on-the-go projects.Features:* Product Name: Limited Countersink Drill Set* Material: Aluminum Alloy* Size: 86*30mm (3.38*1.18in)* Drill Bit Sizes: 2.8mm, 3.2mm, 3.5mm, 4.0mm* Shank Diameter: 6.35mm* Please allow slight deviations in the measurements.Color: BlueMaterial: MetalPackage Contents:1 countersink drill, 5 center drill bits, 1 air drill clutch, 5 drill bits