The spring stay is typically used on an outward opening door to provide a degree of friction as the door opens.
It limits the doors opening angle and uses a spring recoil feature to act as a shock absorber when the door is fully opened. This helps to prevent door damage & reduce wear on the hinges.
It also has a hold-open feature that will hold the door open in the fully open position.
If the stay is mounted closer to the hinge the door will open beyond 90°. However, if it is mounted further away from the hinge the door will open less than 90°.
All parts are made from galvanised steel. Fixing pack and spring included.