Mul-T-Lock lock installation, repair, and replacement by high security specialists. Mul-T-Lock builds high security cylinders, Hercular deadbolts, and heavy duty padlocks around its patented telescopic pin technology. We install, replace, and repair this hardware across Maryland, Washington DC, and Northern Virginia. With 25 years in business, licensed, insured, and bonded, we protect your security as carefully as Mul-T-Lock engineers it.
Founded in Israel in 1973 and part of the ASSA ABLOY Group since 2000, Mul-T-Lock sits firmly in the high security tier. Its signature products are telescopic pin-in-pin cylinders, Hercular deadbolts, padlocks, and retrofit cylinders that fit most major American lock bodies.
The technical signature is that patented pin-in-pin system behind the Classic, Interactive+, and MT5+ platforms, with key duplication controlled by a personal key card. We service it on residential entry doors and District of Columbia commercial buildings alike.
Three issues dominate our Mul-T-Lock service calls: stiff cylinders where debris binds the tight telescopic pins, lost key cards that block authorized key duplication, and worn tailpieces on older retrofit cylinders that stop throwing the bolt. Our Mul-T-Lock locksmiths clean and service pin-in-pin cylinders, restore key control with genuine blanks, and swap failing retrofit parts on the spot. Locked out? Our mobile units respond 24/7.
From telescopic cylinder repairs to Hercular deadbolt installations and full key control setups, we handle every Mul-T-Lock service under one roof, backed by genuine parts, 25 years of experience, and fully mobile units across Maryland.
Repair is the right call when a telescopic cylinder binds, springs weaken, or a retrofit tailpiece wears. Our locksmith inspects the cylinder, key set, and surrounding door hardware before recommending anything.
We carry genuine Mul-T-Lock springs, pins, and cam parts, and we say honestly when a damaged or discontinued cylinder deserves replacement instead. Call (240) 345-1455 in Maryland or (202) 800-2622 in Washington DC and NOVA.
We recommend replacement after break-in damage, a lost key card with keys unaccounted for, or when an aging Classic platform deserves an upgrade to Interactive+ or MT5+. We match your existing bore, backset, and door prep, no new drilling.
Retrofit cylinders let us bring Mul-T-Lock security to most lock bodies you already own, with same-visit frame fixes from our in-house door expert. Call for a free estimate.
We install new Hercular deadbolts, high security padlock systems, and retrofit cylinders on every property type, checking door thickness, backset, and your existing lock body before we quote.
Correct installation protects the telescopic mechanism from side load, keeps your warranty valid, and preserves smooth key rotation. Our own certified technicians handle every job: assess, install, then test operation and security before we leave. Estimates are always free.
High security hardware only protects when serviced correctly. We bring genuine parts, factory level knowledge, and 25 years of experience to every Mul-T-Lock call.
We stock and fit only genuine Mul-T-Lock cylinders, keys, and components, protecting your key card control and keeping every Interactive+ or MT5+ warranty fully intact.
Our locksmiths understand pin-in-pin cylinders from the inside, servicing Classic, Interactive+, and MT5+ platforms with the precision this patented telescopic mechanism was engineered to demand.
Our mobile units carry Mul-T-Lock cylinders, retrofit tailpieces, and padlock bodies, so most repairs, replacements, and high security upgrades finish in one visit, not two.
Even MT5+ cylinders fail behind a sagging door. Our in house door expert squares frames, hinges, and strikes on the same visit, so security holds.
One worn Mul-T-Lock cylinder can undo years of security planning. Call (240) 345-1455 for Maryland service or request Mul-T-Lock help online
Mul-T-Lock is one of many lock manufacturers we service every single day. Browse the other trusted brands our technicians install, repair and replace across Maryland, Washington DC and Northern Virginia.
Straight answers from our technicians to the Mul-T- Lock questions customers ask us most.
(240) 345-1455
We repair first whenever possible. A stiff telescopic cylinder usually needs cleaning and genuine springs, while a lost key card with keys unaccounted for often makes replacement the safer call.
We give free on-site estimates. Price depends on the platform and door prep, with no hidden fees. Call (240) 345-1455.
Yes. Our mobile units cover the District of Columbia and NOVA with same-day availability. Call (202) 800-2622.
Only within the same Mul-T-Lock keyway, with your key card present. Keys from other brands cannot operate a telescopic pin cylinder.
