Traditional Locks
The mechanical designs that shaped home and commercial security for centuries — and still live inside most doors today.
Before electronics, security was pure mechanics: pins, levers, wards, and bolts engineered to resist force and trickery. These traditional lock types evolved over hundreds of years and directly influenced the deadbolts and mortise locks installed in buildings worldwide. Understanding them explains how modern locks work — and why some vintage designs remain surprisingly effective.
Surface-mounted locks that dominated pre-mortise door hardware. Simple, visible, and historically everywhere.
The skeleton-key era. How wards block wrong keys and why these locks are easy to pick but hard to forget.
From ancient Egypt to the Yale lock — the pin stack, shear line, and why this design won the world.
Levers instead of pins. Chubb, lever mortise locks, and the mechanics behind many high-security doors.
How safes combine thick steel, complex locks, and relocking devices to protect what matters most.
Portable security from Roman iron bodies to laminated Master Locks on gates and lockers worldwide.
Lock bodies built into the door — the commercial and historic standard for durable entry hardware.
Dial wheels, disc packs, and push-button codes — opening without a key.
Rotating disc mechanisms favored by Abloy and others for pick-resistant outdoor security.
Hierarchical access with master wafers — how one key opens many doors, and the trade-offs involved.
Circle keys on vending machines, display cases, and bike locks — compact radial pin tumblers.
Single and double-cylinder deadbolts — grades, throw length, and the standard for residential doors.
Interchangeable profile cylinders — snapping attacks, anti-snap features, and EN 1303 ratings.
Quarter-turn cabinet and drawer locks — cam tabs, key types, and office furniture security.
Flat tumblers for cabinets, mailboxes, and automotive ignitions — mechanics and limitations.
Bitting on the key face — European high-security profiles and perpendicular keyways.
The secondary locking bar in Primus, Medeco, Abloy, and other high-security cylinders.
Spring bolts, deadlatches, and deadlocking features that stop carding attacks.
Restricted keyways, UL 437, and what marketing labels actually mean.
Duplication policy, security cards, and restricted blanks — policy as important as mechanism.
Spools, mushrooms, and serrations — the false sets that stop rakes and naive picks.
Mechanical magnetic tumblers — distinct from powered door maglocks.
Builder keys for new subdivisions — retired automatically at move-in.