C.S. Osborne & Co. No. 1014 - Zipper Jig (MPN# 64506) Holds YKK zippers sliders from sizes # 2.5 to 10. Lower clamp securely holds zipper jig to your counter. Upper clamp is used for locking jig rod in any direction. Also allows you to put zipper on backwards. Fully nickel plated. Instructions are included.