Double reinforced construction with stainless steel outer case and cold rolled steel inner case for strength and durability. Nickel plated hardened steel shackle resists rust. Easy, dependable 3-number dialing with automatic scrambling feature to prevent reopening of lock. Standard black dial. No. 1525 offers key control for immediate supervisory access. Ideal for schools, health clubs and employee lockers; where an administered locker security system is required.