WOOD DRILL BIT KIT - It comes with 8 pieces wood drill bits, a hex wrench and a storage box. The wood twist drill bits are 3mm(2pcs), 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, enough to meet your variety of needs. DURABLE & STURDY - Our wood drill bit is made of HSS steel, high hardness, good wear resistance, high heat resistance. Perfect for drilling in wood, plastic, rubber, PVC and other materials, not a power tool, can not fit hard things like steel, iron, stone. USES - The wood router bits are used for drilling on wooden floor or other hardwood, suitable for bench drill, hammer drill, for drilling machines with chuck and more. QUICK CHIP DISCHARGE - The wood twist drill bits have the chip flutes and five-edge chamfering machine, can discharge sawdust quickly to get a smooth surface on any type of hardwood. ADJUSTABLE LENGTH - The wood router bit kit accompanied with a hexagon sleeve which is adjustable, to adjust the various length screws by loosening and tightening the screw. Can also be