OEM Replacement Blades: Compatible with Husqvarna, Craftsman, and Poulan part numbers 173921 53217392 5321739-21 Complete Set: Includes 3 high-quality blades for a full deck replacement Perfect Fit: Blade dimensions of 16-5/8" in length and 2-1/2" in width Secure Installation: Features a 5-point star center hole for a precise and secure fit Commercial-Grade Performance: Designed to deliver superior mulching performance for commercial use Durable Construction: Made from high-grade materials to ensure longevity and consistent performance Trusted Brand: Mr Mower Parts is known for delivering high-quality lawn care products that you can rely on for all your mowing needs Upgrade your lawn mower's performance with the Mr Mower Parts Commercial Mulching Blade Set, designed to fit 48" cut decks compatible with Husqvarna, Craftsman, and Poulan mowers. This 3-pack blade set replaces OEM part numbers 173921 561735XB 53217392 5321739-21 2748GLS YTH2148 PB20VA48 180054 532173921 532180055 917532173921, ensuring a perfect fit and reliable operation. Each blade in this set measures 16-5/8" in length and 2-1/2" in width, featuring a 5-point star center hole for secure attachment. These commercial-grade mulching blades are specifically engineered to deliver superior mulching performance, providing a cleaner, healthier lawn. Ideal for both residential and professional use, this blade set ensures your mower operates at its best, offering durability and exceptional cutting results. These blades are engineered for commercial-grade mulching, providing superior cutting and mulching performance to keep your lawn looking pristine. Constructed from durable materials, these blades ensure long-lasting use and consistent results, making them an excellent choice for both commercial landscapers and dedicated homeowners. Upgrade your mower with this reliable and efficient mulching blade set to achieve the best possible lawn care results.