3M AC4001 Protecta Viper Lt Rope GrabCode: 472953000 Protecta Viper LT Rope Grab with Extension Each A lightweight fall restraint and fall arrest device with automatic locking function for added security Must be used with 3M Protecta Viper LT Kernmantel Rope (available in various lengths) 12. 5 mm rope which is stronger and more durable when compared with traditional three strand ropes, increasing the ropes working life Made from powder coated aluminium for improved corrosion resistance