Main Features
1)  The lock and gate use key-lock system,the interface is level with anti-snag function,the rope is winding rapidly when descending;the direction of oval-shaped lock is fixed by any long axis,suitable for rapid descent of spiral rope.
2)  Screw-lock system (SL) works stably and reliably in dusty,muddy or icy condition,suitable for infrequent door opening and closing.
3) Anti-snag system prevents it from catching clothing and fittings,reducing risks of and increasing descending speed.