Wide parallel opening grippers are double acting actuators which working principle is a double pinion-rack mechanism in order to get a sincronized movement of the plates to grasp and move a load. End Plates can be easily disassembled in order to fix grasping devices by means of threaded holes mechanical stopper without compromizing its working . On standard they have mechanical dumpers at the end of the stroke, ready to be used with magnetic switches; moreover they have wipers on the racks to allow a safe use even in the dusty environments.