The movement of the lever is converted into an axial movement of the push rod, automatically stepless adjustment of the clamping width up to 13 mm with almost the same clamping force ? without manually changing the pressure screw position, adjustable clamping force up to 2500 N depending on the setting of the adjusting screw in the joint, stable, tempered metal sheets for a long service life, hole pattern on the base plate suitable for millimeters and inches, high-quality, oil-resistant 2-component plastic handle