Master Lock No. 503YLW Latch Tight™ Group Lockout Box, yellow, accepts 14 padlocks or lockout hasps and can be mounted to the wall or carried from job to job. • Lock box holds hundreds of keys and includes organized storage for 12 keys in back of box. • Also features an exclusive, patented Latch Tight™ locking mechanism that prevents keys from being accessed until the last padlock or hasp is removed from the box.