Inspectors can easily measure rings and rounds in a range between 1/16” to 13-3/4” with a single chuck - A large range of sizes with one-handed operation! (no accessary tools required). The center hole is designed to provide maximum back lighting for vision systems and the chuck can be operated one handed with no tools. The spring-loaded design is self-adjusting and reversible allowing parts to be held by the inside diameter or outside diameter. The three springs can be employed independently or in unison, providing clamping force options ranging from 1.59 to 14.73 pounds per inch. This one-of-a-kind inspection fixture has an overall size 12.5” across, the clamping jaws are constructed of 303 stainless steel, while the base, guides and dynamic wheel are Teflon hard coated and clear anodized 6060t6 aluminum.