GMP Break-away Swivels give you invaluable protection when pulling either fiber optic or coaxial cable. These simple tools provide an inexpensive fracture point between the pulling line and cable avoiding costly cable damage if the cables rated pulling capacity is exceeded. The breakaway swivels are available in two diameters; 7/8 in. (22.23mm) made from high quality aluminum and 5/8 in. (15.88mm) made from steel. The 5/8 in. size is extremely convenient when working with innerduct sizes below 1 5/8 in. in diameter. The design of the breakaway swivels incorporates a replaceable tension bolt that joins the barrel eye and swivel body. The bolt separates when pulling loads on the cable reach +/-5%. The damaged bolt can then be replaced in seconds using an Allen Breakaway Bolt Wrench (included) and screwdriver