Mad Rock Lifeguard This is a more compact and convenient belay device than the Grigri. There are only minor scratches, and there are no issues with its use, but as it is climbing equipment, please check the condition and use it at your own risk. Below is the manufacturer's description. Although it is ultra-compact, it is made of stainless steel and forged aluminum, boasting high strength and locking ability. Rope feeding is very smooth. It is also known as a belay device with a high usage rate among instructors in North America. Thank you for looking. I look forward to your business.