Features: Can be used for nail gypsum board, partition wall, board, ceiling. The automatic screw delivery system can deliver screws quickly and accurately. Chain with 50 screws design is easy to assemble and operate. With exquisite workmanship, more stable and reliable. Easy to get new chain when you run out of your screws. With screw length and depth indication, you can adjust the screw conveniently. It is suitable for using with electric drill. Notes: The electric drill is not included. The drill switch must be started before the chain adapter can be used. If it can not be used smoothly, please check whether the switch is reversed. Specification: Material: Metal Chain size: about 12.5cm x 2.5cm Product type: Tool Accessories Screw length: about 14.5cm Fit for electric drill DIY Supplies:Woodworking Package Included: 1 x Chain Nail Gun Adapter 1 x Chain Nail(with screws) or 1 x Chain Nail(with screws)