Lock Installation & Replacement in St. Louis, MO

The locks on your doors are the first physical barrier between your family and the outside world. Worn, outdated, or low-quality locks compromise that barrier every day they remain in place. Nonstop Lock & Key provides professional lock installation and replacement service across the St. Louis metro area, helping homeowners and business owners upgrade to reliable, high-security hardware that meets current industry standards.

Our locksmiths install all types of residential and commercial locks including Grade 1 and Grade 2 deadbolts, knob sets, lever handles, mortise locks, keypad entry systems, and multi-point locking systems. We carry hardware from trusted manufacturers like Schlage, Kwikset, Baldwin, Medeco, Mul-T-Lock, and ASSA Abloy. Whether you need a single deadbolt replaced on your front door or a complete lock hardware upgrade across your entire property, we handle it.

Lock replacement is recommended when your current locks are visibly worn or loose, if the lock has been compromised by a break-in attempt, when the key sticks or is difficult to turn, if you want to upgrade from a basic Grade 3 lock to a more secure Grade 1 or Grade 2 product, or if you are renovating and want hardware that matches your updated decor. Our locksmith will assess your current setup and recommend the right product for your security needs and budget.

Every lock installation includes proper alignment, strike plate reinforcement, and testing to ensure smooth operation. We also offer keyed-alike service so all your new locks operate with a single key. Call (314) 532-1112 for a free consultation or to schedule same-day lock installation anywhere in the St. Louis area.