I purchased a replacement Hoppe Bottom Gear lock set for my French double doors. As a Do-it-Yourselfer, I found myself overwhelmed by the scope of removing the old lock set and installing the new one. Matt and Nick were terrific. They were very patient with me and walked me through each step of the removal and reinstallation process. They saved me a what would have been a very expensive service call from a professional locksmith. I would highly recommend Patio Door Rollers for outstanding knowledge and service.