About This Premium Tungsten Steel: These drill bits are made from high-quality tungsten steel, ensuring durability. They are wear-resistant, bend-resistant, and rust-resistant, maintaining sharpness even after extended use, making them ideal for hobbyists Precision Drilling: The sharp cutting edges ensure clean, burr-free holes in plastic, resin, soft metals, and more. The double-helix design helps quickly remove chips and easily clear debris, making the drilling process smoother and more efficient Stable & Controlled Drilling: Featuring a shock-resistant design, these drill bits minimize bit drift and vibration, providing better control and stability, which improves precision for detailed drilling tasks Versatile Sizes & Applications: This set includes 10 sizes: 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, perfect for jewelry making, model building, PCB drilling, DIY projects, and precision drilling in plastics and other materials Secure Storage: The bits are neatly stored in a compact, organized plastic case, keeping them safe, accessible, and well-protected during storage and transport Overview Material : Tungsten Steel Brand : DULIWO Item dimensions L x W x H : 3.54 x 0.39 x 2.16 inches Unit Count : 20.0 Count Manufacturer : DULIWO