WIDE RANGE OF USES: The auger drill has professional technology and reliable quality. Extra long drill bits are suitable for most drilling jobs and materials such as aluminum, wood, plastic, etc. Great for DIY, home and general construction projects. Length: 150mm~160mm. ACCURACY AND DURABILITY: Spiral drills are carefully manufactured and designed for professional use, ensuring that the drills can be used for all hobby or precision jobs and provide you with precise design and machining. The auger drill is very sharp and of high quality, so you can use it with confidence. HIGH QUALITY MATERIAL: The auger drill is made of high quality high speed steel, which is more durable than other metal materials. The structure is very strong and stable. It will not bend or break easily. High quality materials ensure that it can be used for a long time without rusting. INCLUDED IN THE SET: The drill set includes 5 of the most popular drill bits in different sizes. It can meet your various needs and is suitable for various scenarios. As a poor beginner, this product will give you unexpected results. Diameter: 2mm, 3mm, 3.5mm, 4mm, 5mm. UNIQUE DESIGN: This auger drill has a pen-shaped design. You can easily adjust the vise head to grip the drill. The precision-engineered sleeve holds the drill vertically, ensuring that you don't sink during use, and it is compact and doesn't take up space. Easy to transport and store.