The Matthews 420110 provides strong, solid gripping of round, square, or rectangular tubing and many other common and irregular shapes. It features an ergonomic handle design and reinforced jaws, and the shaft is 1010 chrome plated steel. It's available with 2" or 3" Center Jaw and 2" or 6" End Jaw. The Center Jaw has a fixed jaw mounted at the base of the Baby Pin portion of the shaft providing strong support for the pin. The End Jaw has the fixed jaw mounted at the end of the threaded portion of the shaft. The Mini Matthellini 3/8" threaded version is perfect for mounting camera, lighting and many other devices w/ 3/8" female holes, and also comes with a jam nut to prevent rotation. Superior in tight places!