About this article. STRAWBERRIES WALNUT: Steel taper drills are used to drill holes in wood or other hardwood floors and suitable for bench-top drills, hammer drills, chuck drills, etc. It is an essential item for everyday woodworking. ROBUST AND DURABLE: Our wood drills are made of high hardness steel, 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 be used to quickly remove accessories. QUICK CHIP VENTILATION: The hexagonal tapered end mill drill bits include a chip flute and a three-sided chamfering machine that quickly discharges wood chips to achieve a smooth surface on any type of hardwood. DIFFERENT TYPES OF DRILLS: We have four sizes of wood drill bit with countersink, 6 , 10 , 13 , 16 . The 6 model is 2.35mm drill size, 10 2.5mm, 13 2.9mm, 16 4mm and is equipped with a 5 hex key, 5 * 2 cm. This is sufficient for your daily needs. See more details.