【Safety Guarantee】: CE 1019, EN341. Our rope grab riser has got CE Certificate, it’s safer and reliable which ensures your security during activity process. 【Practicality】：Great for downhill, mountain climbing, rock climbing, outward bound, training and protection. Suitable for rope from 3.5in to 4.7in. 【Material】: Made of aviation aluminum forged with great toughness and strength, safe and easy to use.