Y3 - 9.5mm x 915mm. The Stronglock range of Squire chains are made from hardened steel, offer high security whilst being light to carry and provide excellent value for money. Every Chain has a stylish grey sleeving and is packaged in attractive retail packs. These chains are ideal for securing storage areas, vehicles, motorcycles, site and plant equipment.. High Security. Hardened Steel. Durable Sleeve. Padlock sold separately