Features: Brand new and high quality A hole making tool that helps you make holes in the drill. it is easy to use and can help you get started quickly. This product is easy to clean, just wipe it with a damp cloth and let it air dry. This twist drill bit is easy to install and remove. it can be easily installed in a few seconds. The twist drill bit is suitable for a variety of drills, such as hss drills, hss drills and other drills. Compared with other traditional drill bit, the new design is more convenient to use. it can be used as a replacement for old or broken ones. Specifications: Material:High-speed steel Dia:12mm/16mm/16.5mm/22mm Total Length:Approx.148mm/5.82inches Package Includes: 1x Twist Drill 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.