Material: high carbon steel material, quenching, high hardness, good abrasion resistance and durability.7 size: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10 mm, the chamfer diameter is 15.8mm, L-shaped wrench, and can meet all your requirements.Easy to use: just loosen and tighten the mounting screws to adjust the drilling length for screws of different lengths. Suitable for wood and plastic Sleeve depth adjustable with a wrench.Application area: Woodworking chamfer drill bits are widely used in plastic flooring, PVC, rubber, parquet, hardwood (hardness less than 25 degrees) or parquet.Quality service: If you have any concerns about this product, you can contact us by email and we will respond to you within 24 hours.Material: high carbon steel material, quenching, hardness high, good abrasion resistance and durability.7 size: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, chamfer diameter is 15.8mm, wrench shaped of L, and can meet all your requirements.Easy to use: Simply loosen and tighten the mounting screws to adjust the drilling length for different length screws. Suitable for wood and plastic Sleeve depth adjustable with a wrench.Application area: Woodworking chamfer drill bits are widely used in plastic floor, PVC, rubber, parquet, hardwood (hardness less than 25 degrees) or parquet.Quality service: If you have any concerns about this product, you can contact us by email and we will respond to you within 24 hours.