1" aluminum bolt 9-3/4" long used to mount XL-2001 side wheel arm to support frame. note: 6565 replaces 100610 Does not fit XL's that are mounted on: MOD 1308 MOD 1008 MOD 808. See part # 100324. The nut used on part 6565 is 1NUT-LC924.Used on: Freestanding XL Combo Module Wave Two X Two Wave LSW