This pin jaw has both a compression and expansion grip. In expansion mode the pin jaws expand from 30mm to 50mm and are typically used for gripping the bases of small bowls, egg cups and goblets. The outer face of the jaws has two machined grooves that cut into the wood to provide a class leading clamping force. In compression mode the pin jaws are used for gripping around small tenons, between 10mm to 30mm in diameter. The smooth, internal centre surface does not mark the tenon. Albeit compact in size these jaws have an extremely powerful grip and are frequently used when initial roughing of the outside of a bowl.

The pin jaw is machined from a special grade of medium-tensile steel, which is normally used for the manufacture of high performance turbo impellors, pistons and gears. Using this steel allows for closer tolerances during the manufacturing process which results in excellent concentricity to minimize vibration and to ensure that a chatter-free, super fine finish can be achieved by the woodturner. ©