!!!! DO NOT BUY A ROCKDOOR !!!! They look nice but that's about it. Im now on my second door as my first stared to warp and wouldn't lock. I put a level on the door and recorded a gap of nearly 20mm!! Was told it was because I bought a RED DOOR and the sun is attracted to them the most! Had problems with the fist door within a month or two. Had the installer out to adjust it. It worked for a week or two then started playing up. Had to slam the door and force the to lock it. Finally managed to get a.second.door under warranty. This work fine for three to four months and now im back to slamming or shoulder barging the door to lock it. Second door is one of the "new and improved" ones. Load of sh*t!!!