Construction material and surface, steel, black, powder coated, resistance guided values steel: max. operating load 1230N, stainless steel: max. operating load: 845N, operating temperature range: -40°C to 80°C, advices for installation mounting with screws M4 or rivets Ø 4( not incl. in shipment). With covered tension spring, shock and vibration safe, the tension spring adjusts mounting tolerances up to 1.7mm or offers up to 2.3mm clearance of the complete locking hook.