4-pack of zinc plated high strength steel D-rings. Used as an universal attachment point for the hooks of motorcycle tie-downs. Can be folded flat, when not in use, to just 1cm high. Break strength 550kg per D-ring assembly. Set includes 8x M6 lock nuts and 8x M6 x 25mm hex head bolts. Net weight 50 grams each. Dimensions 4cm long x 4cm wide x 1cm high.