Tubular Locks feature a latch mechanism where the lock bolt retraction system is integrated directly into the latch body itself. A square or half-moon-shaped spindle extension from the outer handle fits through the latch mechanism, enabling the operation. Once assembled, the inside and outside knobs or levers are mechanically connected via this extension, moving together as a single unit.

This design makes tubular locks relatively simple and cost-effective, ideal for light-duty interior applications. However, they offer limited configuration options and locking functions due to the shared spindle design and compact internal structure.

Cylindrical Locks, in contrast, house the retraction mechanism within the main chassis rather than in the latch. The latch serves primarily as a connector and is structurally simpler. Inside and outside spindles operate independently, allowing for more advanced functionality. For example, cylindrical locks can support various commercial-grade functions such as storeroom, classroom, passage, privacy, and entry configurations.

In many cases, the exterior lever can be “clutched” — it rotates freely without engaging the latch — a useful feature for enhanced security and wear resistance.

Moreover, cylindrical locks use more robust materials. The chassis components, rosettes, and mounting plates are typically made from thicker steel, and both the interior and exterior bushings require higher precision machining to ensure reliable spindle alignment. This durability makes them well-suited for high-traffic or commercial environments.

Because the latch retraction mechanism is enclosed within the outer chassis and protected by a cylindrical sleeve, cylindrical locks are easier to manufacture to UL fire-rated standards, a critical requirement in many building codes.

Tubular locks are perfect when speed and budget matter. Cylindrical locks are better when security and durability are a priority.