Working principle of Black Retractable Anti-Theft Steel Tether Pull Box Reel: One end of the reel is fixed on the wall or ceiling, and cables, air pipes, water pipes, work lights and inspection lights can be wound inside. The input end of the cable reel is connected to an external power cord, which is generally the plug part (without automatic expansion and contraction function); the output end power cord has a self-locking device, and the reel has an automatic cable arrangement function. After pulling out a section of the cable, the self-locking device works ( If you want to recover the cable, you need to pull out a section of the cable, the cable will step over the self-locking device to release the cable, and the cable will automatically retract.
