"Features:- Screw length and depth adjustable- You can reinstall screws nails into chain- Automatic nail feeding, no need to support- Make your electric drill into a automatic chain nail tool- Easy to install, easy to get new chain when you run out of your screws- Installed on electric drill, suitable for plasterboard, partition wall, wood board, ceiling, etc- Fast, continuous and accurate nail feeding, easy to operate- Screw lengthadjustable.For different length screws, the nozzle length should be selected- Depth length adjustable. Adjust screw up, shallower, adjust screw down, deeper- Applicable to the installation of ceiling, kitchen cabinets, etc