S-TEC Blocker DUCK with Type Extensor

S-TEC Duck R Back-Up Device with Extensor

A compact, lightweight rope access backup device designed for professional use. The Duck R features a unique cam action that allows smooth ascent along the rope while instantly locking under load. Its aluminum construction keeps it durable yet easy to carry on harness loops. Compatible with 11–13 mm ropes. Ideal for rope access technicians, window cleaners, and rescue professionals requiring a reliable fall arrest backup that doesn't interfere with mobility.