Metal door reinforcement system for hollow metal and hollow wood doors at cylindrical lockset installation points. Fast, economical solution that eliminates disengaged latch bolts, binding, and “ice-pick” attacks on hollow doors.

May be used for cross bores 1-1/2″ to 2-1/8″ on doors up to 1-3/4″ thick. Centers and supports bolt mechanisms while preventing foreign material fouling. Used by commercial and government agencies. Sold as 5-pack, shipped flat with bending instructions.