Lock ... A safety device which locks the blade in the open position using a lock spring, preventing accidental or premature closure. Often referred to as a front lock or centrelock depending upon the location of the lock release button.
the side of an object that is opposite its front; "his room was toward the rear of the hotel"
Wheel Drive (RWD) The rear wheels receive all the engine power. RWD is preferred over front-wheel drive (FWD) for its superior handling and acceleration capabilities. RWD provides less traction than FWD in poor road conditions because less weight is available over the drive wheels.