Review on Black Duck Industrial Electrical Replacement by Jay Maryland

Difficult to install and poorly constructed (does not hold the wire in place), these connectors do not clearly distinguish between neutral and hot wire connections. After trying to plug two of these into the power cord I gave up on the rest - they just aren't worth the hassle of installing them. There isn't enough room to attach the wires without completely unscrewing the screws, which are then difficult to reattach. A dangerous disadvantage is the lack of a clear distinction between hot and neutral attachment points. The design provides inadequate wire retention which will almost certainly result in the wire being pulled out at some point. In short, DO NOT BUY! I ignored the negative reviews and paid the price.