Carabiner with Split Ring Hook Material:Alumium Function:Bag hook,Gifts,Keychain Carabiner with Split Ring Hook YC-K11031) materia: aluminum2) size : 7.8*4.5cm various size allowed3) thickness: 12mm4) color : various color available , as your pantone code5) logo : is available6) useage : can be used for long time7) function with : multi function- bottle opener , compass ,led mini torch , ...