Set of two replacement blades for 42" Cut John Deere Mowers that have a 0.675" Round Center Hole and replaces code GX20249. John Deere uses either a star shaped or round center hole so please double check your old blade to make sure the center hole matches. Made is USA by Rotary Corp these blades fit the following applications: JOHN DEERE: L100, L100-L118, L105, L107, L108, L110, L111, L118, L17.542, L1742, 14.542GS, 14.542GS Sabre, 1642HS, 17.542HS SABRE: most Sabre with 42" decks