A “lockback” works like a fixed-blade with the added benefit of folding into the handle for safety and convenience. The lockback gets its name from the rocking lock plate visible on the back of the handle. Opening the blade causes the rocker to lock against the blade, locking it open. To release the “lock,” simply push down on the rocker at the back of the handle. Closing usually requires two hands, though there are one-hand openers, which are ideal for activities like climbing where only one hand is free.