Upgrade your lawn mower's cutting power with the Rotary 13977 20-1/2 x 5/8 blade. Designed for durability and precision, this blade is perfect for maintaining a pristine lawn. With the brand Rotary and part number 13977, you can trust in its quality and compatibility. Say hello to a smoother mowing experience with the Rotary 13977 blade. Its sharp edges and sturdy construction ensure a clean cut every time. Keep your lawn looking its best with the dependable Rotary 13977 blade. Say goodbye to dull blades and hello to a beautifully manicured yard. Don't settle for anything less than perfection with the Rotary 13977 blade.