Whiteside Brass Bar Set-Up Kit 2-1/2 in. is a precision tool designed for accurate measurement and setup in woodworking and other detailed tasks. This kit features five machined brass bars that allow you to determine depth of cut, bit height, fence and blade distance with ease and accuracy. Each bar can be used individually or stacked together to combine measurements, providing versatile functionality without causing any damage to your tool edges. The set includes bars measuring 1/8", 3/16", 1/4", 3/8", and 1/2" square, each 2-1/2" long, crafted by Whiteside Machine Company in Claremont, North Carolina. Model Number: 9800