Herschel Parts Disc Mower Knife, 0.9 in Center Hole, Steel, 4.21 in Length, 1.89 in Width, 0.16 in Thickness, Suitable for: New Holland 615, 616, 617, 1409, 1410, 1411, 1412, 1431, 1432, 1441, 1442 Disc Mower, 2331, 2332, 2355 Disc Mower Header
Edges are formed, not ground to prevent chipping or breaking
Made from the USA 10B38 (Boron) steel
Entire blade is heat-treated to a RC hardness of 45-52