elitefts Jammer Arms Rack Attachmentelitefts Jammer Arms Rack Attachment Your home gym just got better! Add these space saving Jammer Arms and your exercise range just added another hour to your workouts! Installation is effortless: simply slide the pin on the style bracket into your upright and secure it with the provided cotter pins. It is advisable to ensure your rack is bolted down before using any rack attachments to prevent unnecessary movement that may cause injury. Fits 3x3