Material: The drill bit is made of tungsten steel, which is wear-resistant, heat-resistant and has good toughness. Durable, drilling and chamfering, a more practical solution. Three-point positioning: Three-point alignment is better, not easy to slip and not asymmetrical. Precise and fast drilling. Fast removal of chips: The 5-blade spiral woodworking drill has a large chip flute, which can quickly remove sawdust and achieve a smooth surface on any type of hardwood, softwood or aluminum. Removable and adjustable: the depth of the woodworking router bit sleeve can be adjusted by a wrench, and 7 different sizes can meet your different needs. Different sizes: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm spiral wood drill bits. Round shank design is suitable for bench drills, hammer drills, and chuck drills on hardwood or hardwood floors. Package size: 22cm x 17.5cm x 2.5cm Shipping Quantity: 1 set, including 7 drill bits, 1 wrench