Features: Functions: This tool makes your electric drill Into an automatic chain nail gun. You can reinstall screws nails into chain convenient. Adjustable Lenghth: Depth length of our electric drill bits tool is adjustable and it can bring more conveniences for you. Material: Stainless steel material which have good corrosion resistance in bad environment like high temperature cold weather and high humidity areas. Thus the bits set can serve you for a long time. Wide Applications: Widely used in all kinds of precision machinery industry classified instruments instruments electronic products printed projects household appliances communication products. Long Service Life: The installation parts can be used continuously bear strong load and have a long service life. Specification: Applications: Fit for electric drill DIY Supplies: Woodworking Material: Stainless Steel includes: 1 * Bits OR 1 * Chain Stud