Stainless Steel Coastal Hardware

A Roto Gear Dyad window operator is a specialized crank mechanism used on casement windows, designed to open and close the sash smoothly using a compact, two‑arm (“dyad”) linkage system. The key point: a dyad operator is built for narrower casement windows where a full dual‑arm operator won’t fit, but it still provides strong leverage and up to a 90° opening.