Works like a champ. Our FTC team has tried a number of chain breakers, e.g.: Servocity/Tetrix and Amazon specials. Either the breaker pins are bending or the pin that holds the chain is not being pushed far enough. This works great. Chain is securely held so the breaker pin doesn't bend and the pins in the chain are fully extracted. Only recommendation is that the unit comes with two pins. Storage for the second pin should be in the unit itself. Also, spare pins should be available for purchase (because you are likely to loose the spare provided).