General description High-performance wood drill bit set designed for precise and crack-free cutting. This set includes eight drill bits with diameters ranging from 3 mm to 10 mm, made from durable chrome vanadium steel. Technical specifications Content: 1 set Drilling diameter: 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm Material (drill): chrome vanadium steel Material compatibility: wood Other information Features CBN grinding process and cubic crystalline boron nitride grinding wheel for enhanced performance.