As another reviewer put it they are "ticking monsters" Bought 2. As usual Revine lost the first order Finally received 2 which I ordered after backordering First tick tick tick tick tick tick every round. I checked the weld by hand before installation, it was smooth but tick tick It's only a matter of time before this one fails Every ticker blade I've ever had failed instantly on the weld Disappointing I won't use another blade like this once I have the ticking monster.