This tool set includes 5 adjustable pin spanner wrenches along with a kit bag. Adjustable Pin Spanner wrenches are drop forged steel handles and have steel jaws. These wrenches are available in maximum capacity ranges from 2” through 6-1/4”, with pin diameters of ¼”, 9/32” and 5/16”. They are available in an Industrial Black finish. These wrenches cover several nut sizes. The pins fit into the holes or slots on the side of the flange or collar. Spanner Wrenches are often used to tighten shafts or pipes. These are special purpose wrenches with adjustable opening feature designed for servicing packing glands, adjustable collars, rings, locknuts, etc.