High security, lower weight locks with 8-10mm hex-link chain. Titanium reinforcement makes it almost impossible to cut
 Both include water and heat resistant cover on chain to prevent abrasion
 Keyed lock: includes (5) keys (1 with micro-light and 4 regular keys)
 Combo lock: features a 5 digit resettable lock
| model | Mastiff Chain keyed | 
| length x width | 1219mm x 8mm | 
| color | black/yellow |