120mm Dark Blue. The Squire Combination Bolt is a unique recodable combination locking bolt which can be used on a wide range of materials and products. The Combination Bolt is able to withstand exposure to harsh environments, is rustproof and has a 4 digit mechanism with 10,000 code operations.. Unique recodable combination locking bolt. Lockable in open and closed position. 4 digit. 10,000 code operations