Sold and Priced as a set of four (4) - Blades are made of heavy-duty steel to exacting specifications. Each blade is designed for longer life and greater performance. Fits: Stone T-36 (34578) Allen 336 (AEC-614F), Allen 436 (AEC-614F)Bartell B336 (TA414) Marshalltown 36-3-1 & 2 ( - Marshalltown Equivalent Sku 17330 Part # M6093