Thomas and Betts new Anti-Rotational Connectors are designed with a rib on the bottom that keeps the connectors from turning, so there's no need to apply excessive torque and there's no danger of loosening connectors. The unique no turn rib provides a secure connection that eliminates conductor pinching that results from connector movement. The new no turn design feature solves a unique problem for electricians and installers. Larger conductors tend to get damaged in overtorque conditions and connectors are prone to loosen in applications where there is vibration such as motor loads. Inspectors and local standards boards are requiring electricians and installers to make provisions to eliminate these conditions and Blackburn Anti-Rotational Connectors are the solution.