KStrong® 5/8 Self-Tracking Steel Rope Grab with Anti-Panic Feature (ANSI)Part: UFG601010 KStrong Self Tracking Steel Rope Grab with Anti Panic Feature. The non captive design provides the ability to place on and off 5 8 approved vertical rope lifeline as needed (ANSI). Moving Rope Grab on flexible anchorage line. Moves along with the user climbing up or down and locks him in the case of a fall. Capable of using on 0. 47 in. (12 mm) diameter Kernmantle Rope. Capable of using on 0. 55 in. (14 mm) diameter & 0. 63 in. (16 mm)