The hardware of a working day.

Common Tolerance designs precision-machined accessories for the surfaces of a working day. Each piece is built around how it will be made — tolerances, toolpaths, and finish constraints inform the geometry from the first sketch rather than being reconciled to it afterward. The catalogue is small and held to three principles: material, mass, and permanence. Metals are chosen where they earn their place. Surfaces are dark anodized, edges are chamfered, dimensions are honest.

A working surface accumulates. Pens, cables, bearings, watch straps, the small hardware of whatever the day demands. These pieces are designed to sit underneath that accumulation rather than compete with it — dark, low, square — and to assert themselves only when you reach for them. The weight in the hand is the reward for the quiet on the surface.