Material: The drill bit is made of tungsten steel, high wear resistance and heat resistance, good toughness. Durable, drilling chamfer, a more practical solution Three positioning points: Three-point centering is better, not easy to slip and no bias. Precise and fast drilling Quick chip evacuation: The 5 flute twist wood bit has large chip flutes for quick removal of sawdust to achieve a smooth surface on any type of hardwood, cork or aluminum Removable and adjustable: Adjustable sleeve depth of wood router bits with a wrench, 7 different sizes for your various needs Different size: The twist wood bits are 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm. Round handle design suitable for table drill, impact drill, for drilling machines with chuck on hardwood or wooden floor Features: Suitable for wood, plastic, rubber, etc., ideal for production, maintenance or portable drilling work. The drilling length can be adjusted for different length screws by simply loosening and tightening the screws without head. The shape of the round shank is smooth, without friction with the machine, and is suitable for most bench or hand drills. Try to keep the drill vertical during drilling, so as not to be uneven. Specifications Material: Tungsten steel Color: Black Drill size: 3mm,4mm,5mm,6mm,7mm,8mm,10mm Package includes: 7 x Drill Bits 1 x Hex Wrench < p>ladaceae