General description High Hardness Fixed Point Punching Woodworking Step Drill Bit Set includes 8 pieces of wood drill bits, a hex key, and a storage box. The set features drill bits of various sizes: 3mm (2pcs), 4mm, 5mm, 6mm, 7mm, 8mm, and 10mm, catering to a wide range of drilling needs. Technical specifications Material: HSS steel Color: Black Dimensions: 3mm (Dia) x 60mm (L) 4mm (Dia) x 75mm (L) 5mm (Dia) x 85mm (L) 6mm (Dia) x 93mm (L) 7mm (Dia) x 100mm (L) 8mm (Dia) x 110mm (L) 10mm (Dia) x 120mm (L) Usage The wood router bits are designed for drilling into wood, plastic, rubber, and PVC. They are suitable for use with bench drills, hammer drills, and drilling machines with a chuck. It is recommended to keep the drill vertical during operation to ensure even drilling. Other information Durable and sturdy construction with high hardness and good wear resistance. Quick chip discharge due to chip flutes and five-edge chamfering design, ensuring a smooth surface on hardwood.