The Brown & Sharpe 599-4816 Thread Measuring Wire Set includes 48 wires in 16 different diameters—three of each size—for measuring and verifying the 60-degree pitch diameter on threaded fasteners that have inch threads from 3 to 48 threads per inch, metric threads from 0.5 to 6mm, and Acme threads from 3 to 16 threads per inch. A 1" long center section of each wire is ground to nominal size within 0.00015". The wires are steel for durability and are packed in a plastic pouch that has slots marked for each size. The set includes wires with the following diameters: 0.018", 0.024", 0.029", 0.032", 0.040", 0.045", 0.055", 0.063", 0.072", 0.081", 0.092", 0.108", 0.120", 0.127", 0.143", and 0.185". Thread measuring wires are commonly used in manufacturing, machining, and assembly operations. Brown & Sharpe manufactures precision measuring equipment and metrology hand tools. The company, founded in 1833, is headquartered in North Kingstown, RI. What"s in the Box?(3) 0.018" diameter wires(3) 0.024" diameter wires(3) 0.029" diameter wires(3) 0.032" diameter wires(3) 0.040" diameter wires(3) 0.045" diameter wires(3) 0.055" diameter wires(3) 0.063" diameter wires(3) 0.072" diameter wires(3) 0.081" diameter wires(3) 0.092" diameter wires(3) 0.108" diameter wires(3) 0.120" diameter wires(3) 0.127" diameter wires(3) 0.143" diameter wires(3) 0.185" diameter wiresPlastic pouch