- Clean and precise holes: Ensures clean, flat holes with no broken edges or vibrations and reduces cutting resistance for higher drilling speed and easy chip removal. - Smooth drilling experience: A high quality woodworking drill bit set that delivers efficient and accurate results for a smooth drilling process. - High quality woodworking drill: Newly developed drill bit with precise positioning function, providing an adjustable drilling depth of 10-50 mm and five common opening diameters (15/20/25/30/35 mm). - Easy to install and use: Easy installation on a hand drill, making it practical for both DIY enthusiasts and professionals. - Use scenarios: - Cabinet hinge bore preparation in wood panels using 35 mm holes with controlled depth to avoid overdrilling. - Dowel joinery and furniture assembly using 15-30 mm hole sizes for strong, clean joints. - General woodworking tasks that require clean holes and fast drilling with minimal chip buildup. - Specifications: - Adjustable drilling depth: 10-50 mm - Hole diameters: 15, 20, 25, 30, 35 mm - Compatible with standard hand drills - Construction: durable, high quality woodworking drill bit set