Extremely robust permanent locking holder and insert system to help ensure security in terms of attachment Once the two parts of the holder are locked together, it can only be removed with the use of wire cutters or pliers Designed to operate with the Unitag insert systems and other control procedures employed on site Material, Nylon 6 (Holders) Dimensions, 50mm (Dia) (Holders) Contents, 20 Unitag Holders, 20 Nylon Strops, 1 Marker Pen FIxing Options: Strop