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 object's axis
CEN , EN ISO 8662-7:1997 , Hand-held portable power tools — Measurement of vibrations at the handle — Part 7: Wrenches, screwdrivers and nut runners with impact, impulse or ratchet action (ISO 8662-7:1997) , 13.3.1998
