3D forged from 2014 Aluminum Alloy for superb strength and weight. Designed in California, forged and contoured 4-bolt faceplate wraps 180 degrees around the bar to reduce stress and hold carbon or aluminum bars firmly in place without stress. 1 1/8". 31.8mm clamp size. 84 degree angle. Only 117 grams for size 100mm! 2 year Warranty.