The Slingco ZSW2091 line-pulling swivel connects rope to swivel in straight-line cable pulls, safely releasing torsional stress that can damage cables. Constructed with high-strength pins and smooth rollers, it supports a safe working load of 2,250 lb (≈10 kN) for underground pulls (3:1 factor) and 1,350 lb (≈6 kN) for overhead pulls (5:1 factor).