Prevent accidental or unexpected start up or release of stored energy when working on equipment and machinery. Text: Front- Danger Do Not Operate This Lock/Tag May Only Be Removed By... Back-This Energy Source has been Locked Out Unauthorized Removal of this Lock/Tag may Result in Immediate Discharge. 6"x3" made of 0.15mil unrippable vinyl, 3/8" reinforced brass grommet, 25/pk.