1). Easy to operate: it is very easy and convenient to operate the machine, unnecessary to train professional operators. 2). Stable performances: hydraulic power, pneumatically auxiliary, automatic locking, all-side limiting punching, independent claw rotating tool holder, self-lubricating bearing sliding steering mechanism, rodless cylinder outside feeding mechanism, idling time-limited halt function and 24-hour continuous running setting. 3). Safe and reliable: outer-machine feeding, photoelectric detection and safety guard for multiple protection.