Powerline Smith Gym. One of America"s favorite gyms with literally tens of thousands of satisfied owners across the nation. We revolutionized home weightlifting in the last decade when we introduced an economical and practical version of a health club tradition, The Smith Machine. The unique, patented bushing system and super smooth sliding carriages will help you achieve rapid results in a controlled and safe environment that has been proven by customers like yourself for years. Bar is 1" In diameter. Pictured with Optional Olympic Adapter Sleeves OAS14. Weight plates and collars optional.