Quickly shape polyester body fillers before they harden completely. These hardened carbon steel blades have hundreds of open, non loading, sharp cutting teeth. Perfect for quickly shaping polyester body fillers before they completely harden. Saves considerable sanding & filing time. Each flat blade measures 10-1/2"long by about 1-1/2" wide. Welded on end cleats readily fit most holders. Sold in packs of 10.