These biners are convenient as they allow for you to easily open and attach items without allowing them to become detached on their own. The biners are made of strong and durable anodized aluminum. Features:- Nickel-plated brass body material- Water tight seal- (2) 6mm Binersmanufacturer no: 9665bar code: 056389096653manufacturer : Coghlansshipping dimensions: weight: 0.1 dimensional weight: 3 (w) x0.25 (h) x5.5 (d)