Our newest J Hooks are designed as a barbell holding accessory that attaches to your Power Cage or Squat Stand that features 2" x 2" upright poles with 1” mounting holes. The peg used to insert on the cage or rack is approximately 1”, which allows for a tight fit on the upright poles. It features a heavy-duty steel base that creates a sense of security when using your barbell during squat type exercises and other intense workout routines. As a bonus, these hooks have a thick layer of grip tape that reduces the risk of scratching or scraping on the steel base. This will also help to protect the knurling on the barbell itself. NOTE: This does not mean that the grip tape will not get damaged during use. It is easy to install and we recommend placing the attachments at shoulder height so you can place the barbell with minimal risk of injury. These are sold in pairs.