Woodworking Toolset: The 5 PCS Countersink Drill Bits Set includes five speed steel bits along with essential accessories such as depth stops and screwdrivers, all stored in a compact box for easy access. Depth Adjustment: Achieve accurate drilling results with adjustable depths for pilot holes and counterbores; use the included wrench to modify depths as needed for your specific projects. Rugged Construction Materials: Each drill bit is made from M2 For HSS and features spiral chip flutes to enhance cutting efficiency. The alloy cutting edges provide smooth countersink holes compatible with screws that meet 82degree standards. MultiMaterial Usage: Engineered to perform well on natural woods, chipboard, plywood, MDF, drywall, and plastics; recommended operating speed is around 200 RPM for performance. Use Case – Furniture Assembly: Drill and countersink holes in wooden panels or plywood components, using the depth stops to ensure consistent screw depths for a clean, professional finish. Use Case – Cabinet and Trim Work: Create uniform countersinks along edges of solid wood or plywood pieces, maintaining depth consistency across multiple holes with the adjustable setup. Use Case – DIY Home Repairs: Mount hardware on drywall or plastics with flush, accurately sized countersinks, leveraging the versatile material compatibility of the bits.