An angled or triangular shaped tread used to turn corners, such as in a spiral stair system
mechanical device around which something can be wound mechanical device used to wind another device that is driven by a spring (as a clock) a worker who winds (e
{i} mechanism or device used to wind something (such as a clock, watch, etc.); one who twists or winds material; climbing plant; device for twisting and winding threads
Steps that wind around a corner or post, turning 90 degrees from the original direction and typically having several triangular shaped treads at the turn