Industrial sewing machine accessories left and right unilateral zipper presser foot P36LN / P36N unilateral presser foot

The package also includes a presser foot change clamp. The clamp is to replace the screw on the presser foot shank. So, instead of using screwdriver to unscrew and screw any time you want to change the foot, you just press the clamp and the foot is off.

• Change Clamp Installation Instruction: Remove the screw used when changing presser foot from one to another. I mean the screw attached to the shank holding the presser foot to the shank. 
• The Change clamp consists of 4 parts: a spring, a screw and 1 cylindrical metal with threading and 1 without threading. 
• Insert the long screw from your left screw hole on the shank while facing the machine
• Insert the cylindrical metal without threading on the other side on your right
• Insert the spring and finish the set up by inserting the cylindrical metal with threading to close in the spring.
• You can then adjust the fastening as you desire.