Rope grabs or ascender are commonly used in many arborist operations including climbing, lanyard adjustment and rigging techniques. Choice the size and style for your particular application. Meets CE120 > EN353-2 (02) and NFPA2001. Specifications: Manufacture: ISC Capacity: 11mm – 1/2″ Shell Material: Aluminum Cam Connector: Bolt & Nut Installation: Semi Permanent