I am happy with this cylinder. After a home purchase we had a deck double door with this style lock, and the owners left no key. The old lock was a CES brand from Germany. Changing the lock was moderate effort, requiring a P2 philips, allen set, and a small pick or heavy paper clip. Removal of the old CES lock required pushing a small release pin under the removed thumbturn, which was not obvious. After easily sliding out the lock, this new replacement one was pushed in. The Prime Line works well. Dimensions provided for outer sizes were very accurate. While the thumbturn is brushed and not polished, it is passable satin finish. The description, fit, and measurements supplied were almost perfect. Our lock screw was a little shimmy to get in but is not drilled entirley straight either, so the lineup issue is on our end probably. I reused the old screw that had a bit of wear on it, instead of the tighter more intolerant new one. Be aware, in addition to the mild difficulty lining up and turning the new mount screw, there some other things that deserve note. First is the lack of rotational deadstops. The older premium lock was not able to be turned around a full circle, by design. You can see this in the picture. This is why slide out removal was impossible, and this was a security feature. But the Primeline toggle DOES spin all the way around freely. Meaning, when locking and unlocking, you may have to do nearly a full rotation around the lock to get it to engage the deadbolt. This is not a big issue. It takes two turns instead of one, to throw the bolt. The engagement is satisfying, and you know the lock is set from the feel of it. I do not believe that a thief would take the time to spin the toggle with a pick in any case, and dont think they could because the cylinder jacket is tight anyway (see below). Last, the toggle is not built to as quite as high a machining tolerance as the stock CES. There is a tiny bit of clearance and play on the feel of it. You can sense there is a half mm of slop in the spin. You can feel this machining on the edges of the slightly small tumbturn as well. No edges are canted or beveled. The lock cylinder itself and the key provided are both tight though. See the picture. Overall this is a really good budget product. It performs the function properly. FOr 20 instead of 100, you can get it done. The price and operation are excellent, the fit and finish are average, and the engineering tolerances good where it matter. If you dont mind spinning the tumbturn two half-turns instead of one, and can see using this long enough for the finish to shine up a bit, it is a really fine choice and a decent product. Best of luck changing out your lock.
