Henry squire solid hardened steel padlock combines compact design with market leading product performance in the 50mm version while the 65mm are tested to the highest cen grades 5 6 all models are designed to resist the harshest of attack these locks function reliably in the worst weather conditions hardened boron alloy steel shackles re keyable 6 pin tumbler in both 50mm 65mm versions giving over 250000 key differs the 50mm is version also available with a 5 pin tumbler available open and c