The Sterling Lock Manufacturing Company established in 1919 became part of Engineering Unlimited, Inc. in 1970. The unique zinc-plated, steel rotary shackle padlock is still helping utilities prevent revenue loss and vandalism 90 plus years later. Over the years, Engineering Unlimited added solid brass padlocks, One-Shot seals and disposable aluminum enclosure locks to the Sterling line. As they were in 1919, all Sterling Security Products are made right here in the U.S.A.
1320 12th Avenue North
Meter, Locks; Sealing/Locking Devices; Plant/Facility Security Equipment