Safely back wind the torsion springs in tricky “slipped cable” situations
Easily slide and tighten the solid steel hub on either end of the torsion shaft to back wind the torsion springs using a 5/8" winding bar unwrap and re-install the cables on drum
8070 Auto-Lock provides integrated security with an electronic solenoid
locking system that releases a shoot bolt above a roller when door is
stopped and withdraws prior to door operation