Jorgensen Replacement Blade For No.4 & 5 Smooth Plane These genuine replacement blades are designed to fit Jorgensen planes. Heavy gauge (3 mm) O1 steel iron is hardened and tempered to Rockwell 60‑64, providing excellent edge retention and solid chatter‑free cutting. Recommended for use with Jorgensen No.4 & 5 Smooth Plane.
