The PRS-4.2 is a professional quality bench mount repair stand designed and built to withstand the rigors of everyday shop use. Includes three mounting holes, making it possible to clamp as high as 16.25" (41cm) from the bench surface. - The 100-3D Micro-Adjust clamp grips nearly any tube from 7/8" to 3" (23mm to 76mm), including aero tubes - The clamp jaws are nominally 2.75 inches (7cm) wide - Clamping height can be raised from 6.5" to 16.25" (16cm to 41cm) above the bench surface - Clamp rotates 360 degrees - Heavy gauge steel tubing - Chrome plated for durability