Grivel Alpha Straight Anodized. Hot forged frames and smooth clipping gates. Each carabiner is individually strength tested and has its individual test number laser carved on it. Specifications for Grivel Alpha Carabiners: Manufacturer: Grivel Last Chance: Yes Features of Grivel Alpha Carabiners: Weight: 48 grams 1.69 oz Weight SG: 55 grams 1.94 oz Strength: 27kN CE and UIAA Certified Testing video: www.libertymountain.com/grivel Package Contents: Grivel Alpha Carabiners