Compact in size, these mini swing clamps are ideal for small workpieces and provide compact down-thrust clamping with the simple turn of the knob. Spring loaded, they generate constant clamping force with every cycle. The single knob operates both the arm swing and clamping motion. Turn the knob to swing the arm into position, then continue turning to lower the arm. When the clamping spindle contacts the workpiece, the internal spring compresses to apply clamping force. A distinct click at the end of clamping confirms that clamping is complete. These mini swing clamps are ideal for scratch-sensitive workpieces with vertical clamping. The part number ending with R has a clockwise clamping direction, and the part number ending in L has a counter clockwise clamping direction. Body and knob are made from 303 stainless steel. Arm is made from 304L stainless steel. Spring is made from 304 stainless spring wire. Clamping spindle and guide pin are also made from stainless steel.