Part Number: M157573, M154140 metal: The U-bolt kit is made from metal, offering good resistance and strength, suitable for lawn garden tractor front u bolts long-term use. Compatible with for Models: Z245, Z425, Z435 (48 inch deck), Z435 (54 inch deck), Z445 ((54 inch (-040000-060000, 080001-)), Z445 (48 inch deck) Eztrak Mowers. Application: This U-bolt is used to secure critical components of the lawn mower, such as the life arm and other supporting parts. It helps these components are firmly attached, preventing loosening or detachment during operation, which keeps the stability and safety of the machine., Weight: 1.36245677916 pounds, Manufacturer: Transail