The Preacher Curl Attachment attaches to the SCS-WB & FIDB benches. Use the attachment to comfortably execute single or double hand curl exercises. The built-in bar rack works nice for easy storage between sets.The Preacher Curl Attachment attaches to the SCS-WB & FIDB benches. Use the attachment to comfortably execute single or double hand curl exercises. The built-in bar rack works nice for easy storage between sets.