The design of an automatic machine is inextricably linked to the safety of the production worker, therefore the perimeter or on-board accident prevention protections must be an integral part of it. Hinges, doorstops, gas shock absorbers, supports, safety handles, locks, sliding pins: these are some of the many essential accessories for the construction of aluminum profile casings and protective barriers. Without dedicated accessories, the modular system of extruded profiles would only allow the construction of work benches and load-bearing frames; vice versa, thanks to the accessories complementing the range of profiles, the designer is free to think of removable openings, doors, sliding doors and anything else necessary to protect the operator and access for maintenance. The micro switches applied to the doors of a safety guard prevent accidental contact between the worker and the moving part and, in particular, the aluminum hinges have been revisited to simplify assembly operations and are therefore immovable.