This is the vacuum wiper arm that is used on CJ, M38 and M38A1 models with vacuum wipers. The blade has the splined end to attach to the wiper motor and accepts the hook end where the wiper blade attaches. The arm is adjustable to move where the wiper sits on the windshield. On CJ5 and CJ6 models this is a replacement.

1 Required per Wiper.