riist mutrite (ka poltide, kruvide) kinni- ja lahtikeeramiseks, a steel hand tool with a handle carrying jaws or a hole of particular shape designed to grip a nut or bolt head, any of various hand or power tools, often having fixed or adjustable jaws, used for gripping, turning, or twisting objects such as nuts, bolts, or pipes, typically at an angle perpendicular to the obj