Recently purchased and installed, I am very satisfied with this product, intended to secure my garage box with door. Solid and practical, I'll just have one small criticism to make: there was no manual, no pattern, no advice provided. Certainly we should not be out of a great school to get there, so here are some tips that will make you may gain some time: - Fit the latch and positioning, garage door closed, - With a marker, note the position of 3 holes to the ground, - With a perforator, make 3 holes in the floor long enough for large screws, - As a peg, use of chemical sealant (TITAN brand for example) in which we will introduce the 3 screws => it takes care fast! - Then position Loeillet note on the door and with a felt position of the 3 holes to drill, - With the aid of a drill, make 3 holes in the door, - To strengthen the binding, use a batten of wood or metal, interior side of the course Garage => supplied screws are long enough to pass the batten, - Set Loeillet at the door and cut if necessary the screws if they exceed too much (risk of damaging the vehicle when the door is closed). That, of course, use a sufficiently strong padlock! I took the padlock Abus Granit 37/60 which is perfect!