3 Jaw Chuck For holding parts at one end or in the middle, allowing for the probe to measure or scan the complete diameter of the part without interference. The 3-jaw clamp can be mounted to a Rayco base plate in the vertical or horizontal position. The standard aluminum jaws allow parts to be clamped on outside or inside diameters ranging from .06” Dia.(1.5mm) to 2.63”Dia.(66mm). Optional Delrin jaws are available upon request for non-marring part holding.