Irwin upgraded the Quick-Grip XP600 one-handed bar clamp, with extreme pressure for heavy-duty applications like installation, demolition and rough glue-ups. The XP600 has an I-beam bar that delivers up to 600 lbs. of hold force, while the patent pending Power Lock system can hold more pressure, longer. Available in 6", 12", 18", 24", 36" and 50" lengths.