Set Of 3, Made In USA Replacement Blades For Craftsman, Poulan, Husqvarna, Blade # 173921, 48" Decks Price is for a set of 3 Mulching blades. Quality Made In USA Rotary Blades replace Craftsman, Poulan, Husqvarna part 173921 16-5/8" Long, 2-1/2" Wide, 5 Point Star Hole These blades are thick, .204"