This is a drill bit with a spiral design, made of solid tungsten steel material and excellent craftsmanship. It has excellent durability and practicality, and can easily help you complete the drilling work. It provides a fast tip that can penetrate most materials quickly. This is a very good punching tool accessory and will be your . Features -Color: Assorted Color -Material: Tungsten Steel -Size: About 3.70X0.80X0.80cm/1.45X0.31X0.31inch -Preferred materials, , safe, durable and practical. -Can improve work efficiency, have higher hardness, stronger wear resistance. -With good process details, corrosion resistance, not easy to rust, it can serve you for a long time. -The design is scientific and reasonable, the application is simple and easy, and the drilling is smoother. -You can buy this and practical tungsten steel drill bit at an . Package list: 10 x drill bits