Is different Track used for Flexible and Rigid?

The track that holds flex letters allows you to put the letter in the bottom track, then flex it to get it into the top track, or vice versa. The track for rigid letters is a little different, you must put the letter into the top track, push it up then drop it down into the bottom track. A flexible letter may bulge out in the center, between the upper and lower track, a rigid letter should stand straight up and can slide in the track. Examples of each can be seen at the bottom of our Sample Letters page. Pictures of flex track and rigid track. Rigid letters are used in overhead signs (as well as some ground level signs) and can be changed with a “change pole”, flex letters must be inserted by hand. Rigid letters are usually done on a better grade of acrylic and last much longer then flex letters.