The Multi-Purpose Work Center offers impressive features for your workspace. Its self-centering jaws open up to 9″ (228.6mm) and evenly distribute weight for stability. Increase organization with the Parts Tray Base Mount and its six trays. The neoprene jaw pads provide a secure grip, making it easy to maneuver through 3-planes. Compatible with all 300 series Heads. The ribbed, neoprene jaw pads provide a secure grip on objects, while the single knob allows for 90 tilt, 360 turn, and 360 rotation. The “double-action” jaws open and close quickly for added convenience. Compatible with all 300 series heads and 5/8″ diameter shaft.