MADE IN THE USA! Don't be fooled by other cheap imported blades you see on eBay! Buy from home! Increased hardness (between 48-52 on the Rockwell Hardness Scale), without brittleness Greater yield strengthÂthe strongest mower blades on the market Better impact toughness (ANSI-S483 compliant) Increased resistance to bending Higher wear resistance Reduced weight Faster start/stop Less wear on PTO clutch break Lower fuel consumption Last longer and need to be sharpened less frequently Our patented MARBAIN material is a durable, cost-effective alternative to abrasion resistant steel and other manufacturing materials SAVE MONEY ON BUYING MORE THAN 1 SET OF BLADES! Save money on buy multiple sets of blades! When you buy 1 set of blades the shipping charge is a flat fee (normally $10-$15. When you add 1,2,3 & etc. more sets the shipping charge stays the same as buying just one set. If shipping is a flat $10 then that is ALL you will pay in shipping. We ship express but depending on how many sets you buy it may have to ship ground because of weight restrictions. 85% of our ground packages are delivered within 3 business days. This sale is for 3 replacement XHT blades. Replaces the following OEM part numbers: GREAT DANE GDU10230 D18086 JOHN DEERE PT11136 M73509 Center Hole: 5/8" Width: 2-1/2" Thickness: .197" Length: 16-1/2" Â· Disclaimer: We list model numbers and part numbers for references only. At times the same model may take different parts based on serial number breaks or manufacturers specifications. We list all the specifications on the part (size, width, length, thickness, etc.) and YOU must know what is needed on YOUR application. We canÂt possibly make it more known as to what you are receiving when you purchase.