The Rebco HO Swivel Joint is designed to minimize wireline twisting during downhole tool string runs. An internal bearing shaft between the upper and lower body allows the tool string to rotate freely below the swivel, even under significant load, without transmitting torsional stress back up to the wireline. This is especially critical when using wedge or teardrop-style rope sockets, which, by design, prevent the wire from rotating at the termination point. Without a swivel, accumulated wire twist can cause tool string components to unscrew downhole during extended jarring operations. It is important to note that a swivel joint is not interchangeable with a knuckle joint; a swivel provides rotation under load with only 1°- 5° of lateral movement, while a knuckle joint provides 15° of angular movement but is not designed to rotate under load. Available in standard threaded connections, 1"–2½" OD.