This is a very helpful accessory to keep your garden building door(s) open when you need easy access or additional ventilation on hot days. Hook and eye sets are simple to fit, and there are also helpful videos in the Help Centre here (or visit https://www.tigersheds.com/helpcentre/videos/).
Firstly, to find the best position, hold hook level on building suitable for good placement of eye on door. The eye location should match door framing on inside door, away from any glazing. Mark hook location on building (use spirit level if preferred). Then screw in the hook at chosen position.Then use the fixed hook to relocate the eye on the door and mark its location. Screw the eye into door frame - and the hook should fit securely into eye.