hexagonal key

You may need a special large hexagonal key called a radiator spanner for this.

She moved the finger closer, half-expecting a spark to bridge the gap between her invisible digit and the nearest hexagonal key.

Scott Hackelman and Erv Wilson designed a 19-tone generalized keyboard clavichord with oblong hexagonal keys in 1975, and marketed it as a kit.

Generalized keyboards are musical keyboards, a type of isomorphic keyboard, with regular, tile-like arrangements usually with rectangular or hexagonal keys, and were developed for performing music in different tunings.

Dylan Horvath manufactures a 280-key MIDI controller with skewed hexagonal keys based on designs by Siemen Terpstra.

Harvey Starr manufactures Wilson Microzone skewed row hexagonal key midi controllers in 248 and 810-key models that can be programmed and the key surfaces organized into generalized as well as many other arrangements.

One solution used a grid of hexagonal keys with symbols inscribed into dimples in the keys that were either in the center of a key, across the boundary of two keys, or at the joining of three keys.