Service Seat Attachment for Auto DollyMerrick Machine Service Seat Attachment for Auto Dolly Are you tired of the poor quality seat creepers on the market with their foam over particle board seat construction and flimsy casters? You can tell that the guy who designed it never had to actually try to use it day in and day out. Merrick was tired of them too so they designed a service seat that is both comfortable and made to last. The Service Seat Attachment converts either a Standard or