Trellidor locks are patented designs that are fitted using specialist tools. These tools are not easily available at hardware stores, which is one of the safety features built into Trellidor gates. You may need to change your lock under the following circumstances: You’ve had an attempted break-in and the lock has been damaged. If you have several sliding gates in your home, you may want to get your gates keyed-alike. This means that all your locks can be opened with the same key, instead of using different keys for each gate. Trellidor offers this option so that you don’t have to keep large bunches of keys around the home. The locks will have to be changed to do this. If you’ve had a break-in it is advisable to change the locks. The home invaders may steal your keys and use them to get in again. The same applies if you have dismissed employees that work at your home. If you have moved into a new home that has sliding security gates, get the original manufacturer to change the locks. You never know who may have had access to the sliding gate keys. If you keep your house keys on the same key ring as your car keys and have been hijacked. Change the sliding security gate locks to avoid the hijackers or accomplices breaking into your home. In all these cases, you need to call in your local authorised Trellidor supplier to replace the locks for you. They will do it quickly and easily as they have the correct tools to do so.