The Inspire Fitness Preacher Curl Attachment attaches to the SCS-WB, FIDB & FID7 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. PREACHER CURL BENCH ATTACHMENT: The Preacher Curl Attachment attaches to the SCS-WB & FIDB benches. Use the attachment to comfortably execute single or double hand curl exercises HEAVY-DUTY STEEL: This preacher curl bench attachment is made of heavy-duty steel and double stitched foam pads BUILT IN BAR RACK: The built-in bar rack works nice for easy storage between sets