Features: Brand new and high quality Made from high-grade alloy steel material, vacuum secondary tempering heat treatments ensure long-lasting use, making them a reliable choice for any DIY project or professional work. These Drill Bit are 1/4 inch hex shank quick release, making them suitable for all standard drills. Perfect for jobs requiring deep holes. Thanks to its strong magnetism, our magnetic Bit attracts and holds screws, allowing for convenient and efficient use. The torque reduction function extends the service life of the drill bit, making it a investment for frequent use. The black phosphating treatments on Drill Bit is anti-corrosion, making them a durable choice that can withstand exposure to various environments. Designed for electricians and professionals who need reliable and durable tools. Also suitable for DIY enthusiasts who value high quality tools for their projects. Specifications: Material:S2 Steel Drill Bit:50mm+70mm+90mm Package Includes: 3Pcs Screwdriver Bit note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.