- Chatter about type of spanner - Socket wrench - Toothed rack which permits movement in one direction - Toothed-wheel device - A pawl, click, or detent, for holding or propelling a
ratchet wheel, or ratch, etc. - A mechanism composed of a ratchet wheel, or ratch, and
pawl. See Ratchet wheel, below, and 2d Ratch.