Features:- Ideal for DIY, home, garden, and general building using- Made of high-speed steel material, strong hardness and durable to use- The surface is polished with titanium material, anti-corrosion and anti-oxidation- 5 different diameters: 1 / 1.5 / 2 / 2.5 / 3mm, meet all your needs- 50 pieces are in a pack, and every size is including 10 p...