Designed exclusive for the Body-Solid GS348B Smith Machine. The Body-Solid GPU348 Pull-Up Bar is a knurled pull-up bar allowing users to perform pull-up and chin-up exercises on the GS348Q Series 7 Smith Machine. The GPU348 is not compatible with the Body-Solid GS348BP4 Smith Machine with Attachments, or units with the GLA348BS Lat Attachment.