The intent, in addition to building strength and conditioning, is to toughen the knuckles, wrist, and forearm in the punching position.
2.
A typical CNC turret punch has a choice of up to 60 tools in a " turret " that can be rotated to bring any tool to the punching position.
3.
When you come out of the weave ( a low crouch that moves you into punching position ), if you're too far away your opponent can time you and you're a sitting duck.