The Federal Specification FF-C-450 Type 1 Class 1 covers wire rope grips which are 6mm and over. This specification exceeds ISO DIN 1142. The Crosby clips 6mm upwards comply with the specification and the smaller grips would comply if the specification had a wider scope. Each forged base has a product identification code. The clips are individually bagged with full instructions and they are fitted with a red u bolt for instant visual recognition.