This Billet Aluminum tightening fixture is perfect for Sandvik Capto C3 tool holders. It allows you to easily and quickly tighten or loosen the tool holders without the risk of damaging the live tool holder inside the machine. The fixture is mounted to a stand or workbench with 3/8" socket head screws and has a bolt spacing of 2.0" on center. It measures approximately 3.0" x 4.0" and is a great addition to any machine shop or garage.