Set of 3 BLADE HUSQVARNA 17-3/4In. X 5 POINT STAR Copperhead Mulching Blade fits Husqvarna 574870801. Requires (3) blades to fit a 52 In. cut. HUSQVARNA 574870801 LENGTH:17-3/4″ WIDTH:2-1/2″ C. H. DIA:5 PT STAR THICKNESS:0.2040″  100% of all Rotary blades are manufactured in the USA, and includes commercial-strength and heavy-duty blades, commercial mulching blades, flat blades, high and low-lift blades, edger blades and de-thatcher blades. Rotary, which produces over 8.5 million lawnmower and edger blades annually. On average, Rotary manufactures one blade every 4.5 seconds and serves customers in all 50 states and in 68 countries around the world. Rotary Corporation is recognized as the worldÕs leading supplier of outdoor power equipment parts, tools and accessories. Founded in 1957, the companyÕs vast inventory of more than 9,000 outdoor power equipment parts is available through servicing dealers and distributors from coast to coast and worldwide.