I purchased a double sided lock model codelock 5000 electronic from go keyless and a matching aluminum box for gate both recommended by Curtis for 500.00. I have the box welded on gate and schedule locksmith to install. I take off work to meet locksmith at house only to find they sent mismatch box and lock. Box is 2 3/4 and lock is 2 3/8. I call go keyless furious because now I will have to pay to have locksmith apptmt again. Gokeyless agrees to overnight the correct 2 3/4 cylinder. I reschedule locksmith for three days later. 2 3/4 cylinder arrives, Locksmith arrives, and after taking everything apart to install, lo and behold, it is not the correct model for my lockset.It is not made by same manufacturer, is wrong size plate where tongue goes and spindle is much too small. The spindle is completely a different size by a long shot. I call go keyless furious again. They offer to overnight to me the correct cylinder 2nd time but now I have to reschedule locksmith and take off work a 3rd time to meet at house. I demand a 250.00 discount on my 500.00 bill because of the extra costs to me for locksmith visits. They begrudgingly agree to a 100.00 credit to my bill. Tom at extension 125 is the person I dealt with. He was the third person I had to speak to. First Curtis, then Craig, then finally Tom. They are nice people but buyer beware.