Locked out? Need more security? A Discount Lock Co. is a Chicago area locksmith. Our customers know they can turn to us as full-service lock and key specialists. Commercial and residential customers have relied on us for over 35 years.A Discount Lock Co. can supply: Door closers Master key systems Dead bolt locks Security locks Keying Desk file cabinetsWe are licensed, bonded and insured, and we sell Medeco high security locks. If you need a Loop locksmith, call A Discount Lock Co. today!