This Irwin Quick-Grip 24 inch clutch lock bar clamp requires minimal effort for a tight hold. It relies on a sturdy bar for strength and features a reliable clutch to adjust positions in seconds. This Quick-Grip clutch changes clamp positions and locks the Irwin 24-inch bar clamp where you need it. These plates also distribute pressure across an even surface so you do not crack or damage your material when you add pressure.