Look for a number on the back of your existing zipper slider those slider for #5. Zipper Repair Kit Solution - YKK #5 Assorted Metal Pull Sliders good for repairs worn out or broken sliders. YKK Slider #5 Coil Brass & Aluminum Metal Single Locking Pull is specifically designed for use with YKK #5 Coil Zipper Chain. This zipper slider features a locking mechanism designed to grip the zipper chain to keep the slider from moving until the pull tab is tugged. Strong metal construction and single zipper pull.