WALNUT CUTTERS: Steel taper drills are used for drilling holes in wood or other hardwood floors and are suitable for bench drills, impact drills, chuck drills, etc. It is an essential item for everyday woodworking. STURDY AND DURABLE: Our woodworking drill bits are made of HSS steel with high hardness, good wear resistance and high heat resistance. The drill bit is ideal for drilling holes in wood, plastic, rubber, PVC and other materials.It is not a power tool and cannot be used for hard objects such as steel, iron and stone. ADJUSTABLE LENGTH: The High Speed ​​Steel Taper Drill Bit Kit includes an adjustable hex socket that can be adjusted by loosening and tightening the screws with a hex wrench. It can also be used to quickly remove accessories. QUICK CHIP VENTILATION: The hexagonal tapered end mill bits include a chip flute and a three-sided chamfering machine that quickly unloads wood chips to achieve a smooth surface on any type of hardwood. DIFFERENT TYPES OF DRILL BITS: We have four sizes of wood drill bit with end mill, 6 , 10 , 13 , 16 . 6 model is 2.35mm drill bit size, 10 model is 2.5mm, 13 model is 2.9mm, 16 model is 4mm and is equipped with wrench 5.5 * 2cm hexagonal. It is sufficient for your daily needs. Product Information ： Material: Drill bit - 4241 high speed steel, black chamfer - 45 steel Drill bit size: 6 ： 2.35mm ， 10 ： 2.5mm ， 13 ： 2.9mm ， 16 ： 4mm Hex wrench size: 5.5 * 2cm Weight: 80g Specification: 6 ， 10 ， 13 ， 16 What's in the box ?: 4 Packs x Steel Taper Drill Bits (6 ， 10 ， 13 ， 16 ) 1 Pack x hex wrench Service Guarantee ： If you have any question, you can contact us at any time. We will respond to your email within 24 hours.