UNION 1K57 AVA Barrel c/w 3 KeysThis item is a replacement barrel to suit the Union 1K57 concealed shackle padlock which in turn is often used in conjunction with the Union (formerly Chubb) 7B018 and 7B020 padbars. It has a high security 10 disc AVA mechanism and is supplied with 3 keys. For use within Union 1K57 concealed shackle padlock Key withdrawal only when locked Protected against drill attack Lock and 3 keys only 1K57 is suitable for use with Union (formerly Chubb) 7B018 and