Includes (4) 503217321 Screws . New, Bulk Packed. Genuine OEM MTD Replacement Part. Consult owners manual for proper part number identification and proper installation. Please refer to list for compatibility. Compatible with the Following: Husqvarna: 435, 435 E, 440 E, 445, 445 E, 450 E, 455 E, 455, 455, 460, 340, 340 E, 340 EPA, 345, 345 E, 345 EPA, 350, 350 EPA, 345EPA, 450