Feeders and stackers monocolumn provided with clamp or vacuum pad grippers , electrical movement of all the axes by means of inverters , completely configurables for the user, management of load and discharge in any of two senses, from right hand to left side or vice versa, interface charts by means of PC, possibility of managing the functioning of the load and discharge from the proper control and desk of controls of our machines if it is that they work jointly with them.