Longer Life 596-900 Gator Fusion G5 3-In-1 Mulching Blades to Replace 134149, 532134149, 139775, 532139775, 138971, 138498, 127843: Craftsman, Poulan, Husqvarna, Made in USA Quality Gator 596-900 "Fusion G5" Mulching Blades 21&quot; Long, 3&quot; Wide, .164&quot; Thick, 5 Point Star Mounting Hole Replaces Craftsman Poulan Husqvarna Blade #&#39;s 134149 532134149 139775 532139775 138971 138498 127843 Fusion Blades have Tungsten Carbide &quot;fused&quot; to the edge (see photo) for longer life Extended cutting length, blade is sharpened longer up the blade