General description 7-piece wood drill set featuring HSS countersink, carpentry reamers, core drilling, and chamfer countersink drills. This versatile set includes drills with a diameter range of 3mm to 10mm, designed for woodworking and plastic applications. Technical specifications Material: Carbon steel Sizes: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm Chamfer diameter: 15.8mm Usage Suitable for wood and plastic materials Ideal for plastic flooring, PVC, rubber, parquet, and hardwood (hardness below 25 degrees) Adjustable sleeve depth using a wrench Easy to use: Loosen and tighten fixing screws to adjust drilling length for different screw lengths