I have a 23x72 cutting mat and it's in two pieces. It's held together by a clamp on both ends that has 2 screws on each end. Every so often I have to check the screws because they become loose. Ask at your local quilt store if they can order just the parts I'm talking about. The clamps are gold colored and slide on. Then you put the gold colored screws in the holes and just tighten them with your fingers. I know you can order them separately, because I accidentally lost a screw because I wasn't paying attention and one came loose and fell off and I couldn't find it. Maybe google 23x72 cutting mat. I just looked at it and it's called an "Olfa Mat Clip". Hope that helps.