The all-purpose C-Clamp for heavy duty woodworking and medium duty metalworking jobs is equipped with a spring supported moving jaw and saves up to 75% of time against a traditional C-Clamp. Due to the moveable jaw, the length of the thread is reduced to the minimum. Stronger than other Quick-Release C-Clamps. Meets end-user requirements as it saves time, has a deep throat depth and has a range of clamping depths