NOSGLB02 / GLB02 LOCK BOX GROUP HEAVY STEEL Group Lockout Boxes To be used for work team lockout situations where there are multiple employees, energy sources, machines and processes to be locked out. All keys are stored in the lock box until the job is complete and all group members are cleared from the work area. Heavy Steel Construction. Single Lock Box: The group leader or foreman controls the lock to the box. 13 Lock Box: Simplifies lockout of large equipment. Each authorized worker orteam leader places a personal lock or tagout device on the box. Accepts up to 13 individual locks.