Keep track of wrenches with metric and SAE labels. Updated label stock stays put better than ever - simply peel and stick onto the recessed label panel. Previously used organizers should be prepped prior to installation. There are 128 labels in total, including two sets of all common sizes. There are 37 metric sizes from 6mm to 42mm and 27 SAE sizes from 1/4” to 1-3/4”