Made from durable steel bar, Martin Tool Adjustable Face Spanner wrenches come in a range of capacities (1/4" - 4") and pin diameters (3/16", 1/4", 5/16"). The Industrial Black finish gives them a professional look, and they can accommodate various nut sizes. With tough forged pins and hooks, these wrenches are built to last and are commonly used for tightening shafts or pipes. Designed for servicing packing glands, adjustable collars, rings, locknuts, and more, these special purpose wrenches feature an adjustable opening for added convenience and versatility.