Blades are made of heavy-duty steel to exacting specifications. Each blade is designed for longer life and greater performance. Fits: Stone T-36 (34586) - Allen 336 (AEC-1040FO), Allen 436 (AEC-1014FO) - Bartell B336 (TA414F) - Fits Goldblatt PT4-3 - SET OF 4 BLADES