The Dahle 507 12.5" Personal Trimmer makes it easy to cut paper, photographs and films accurately and precisely, with a ground circular blade that cuts in either direction. Dahle Personal Trimmers are the first choice of scrapbookers. There are two (2) different replacement blades for the 507 and 508 Trimmers.
If your 507/508 Trimmer has a round slide bar, the replacement blade is a #644. If your 507/508 Trimmer has a rectangular slide bar, the replacement blade is a #970 (Standard Cutter Head). The decorative head set and its individual components are for use on the 507 Trimmer ONLY.