Adorox 40 Pack Silver Chrome Color Swivel Eye Lobster Snap Clasp Lanyard Hook Chrome Silver color Lobster Clasp 1-1/2" L x 1/2"W. Lobster claw snap hook with spring-loaded automatic gate. Full 360 degree swivel eye helps prevent tangles. 1/2" ID Hook, 3/16" snap opening, 3/8"eye size. Perfect for many uses.