Introducing the VTS (Versa Trolley System), a revolutionary addition to your fitness arsenal. Dubbed the "rack smith machine unit," it goes beyond converting your squat rack or CrossFit rig into a smith machine – it's a game-changer. The VTS seamlessly accommodates your own barbell with our proprietary clamp system, featuring UHMW rollers to safeguard against scratches. But that's just the beginning. With our patented hex port system, the VTS opens the door to a myriad of attachments. From our specialized barbell to single handles for isolateral movements, a patented 3D handle allowing adjustable angles and widths, to a foot plate and shoulder pad unit for leg press and hack squats – the possibilities are endless. The VTS isn't just a smith machine adaptation; it's the epitome of versatility. As the name suggests, it's the Most Versatile Trolley System ever created, transforming your squat rack into a space-saving, cost-effective hub for countless gym machines. Elevate your home or personal training studio with the VTS – where innovation meets efficiency. Each VTS features eight (8) UHMW rollers. Each roller contains bearings which allow for smooth travel up and down your rack. This product comes with two (2) VTS units and two (2) latch hooks.  *VTS is not designed to be dropped, doing so can result in damage to rollers and other hardware. Doing so can result voided warranty.*VTS is designed with the understanding that your rack is firmly mounted in place. Rack has the propensity to tip based on amount of weight and angle of pull. Purchase of VTS assumes you have read and understand all risks associated with it’s use.