Stens 390-171 Metal Edge Trimmer Blade Replaces: Allen: SE 1601, SE00603 Grasscraft: GC 1601 Trim-A-Lawn: 13051 Fits Allen: 418H, 421H Grasscraft: Allen Clean Cut Hover mower Universal: Stihl, Hoffco, Husky Tri-King, Weed Blaster and Weed Master trimmer heads Use with 385-479 trimmer head