skivlås

Skivlås (literally "disk lock" in Scandinavian languages) is a class of mechanical lock that uses a series of rotating discs (or tumblers) instead of traditional pin tumblers. Each disc has a gate or notch; when a correctly shaped key rotates the discs to the proper angular positions, the gates align and allow the locking mechanism to turn and release. The design is commonly known in English as a disc detainer or disc tumbler lock.

The disc principle was developed and brought into widespread commercial use in the early 20th century; manufacturers in Northern Europe popularized the format for high‑security cylinders, padlocks and door locks. Skivlås constructions vary in disc count, key geometry and additional features such as sidebar mechanisms, false gates or hardened housings to increase resistance to attack.

Advantages of skivlås include strong resistance to conventional pin‑tumbler picking and bumping, smooth operation and durability in exposed environments. Limitations include the need for precise manufacturing, potential vulnerability to specialized impressioning or decoding tools, and susceptibility to destructive attacks like drilling or freezing if physical protection is insufficient.

Skivlås are used where higher security or specific mechanical characteristics are desired: commercial and institutional doors, safes, bike and motorcycle disc locks, and some padlocks. As with all locks, overall security depends on design details, quality of materials and proper installation.