Replacement Zipper Head with Short Auto-Lock Pull
This pull fits MOST, not ALL, #10 molded toothed zipper yardage & separating marine zippers.
Pull is on 1 side of head: used on a bag or maybe a jacket or vest. If you have a TENT, then you need a DOUBLE PULL.
Auto-lock head (when you quit pulling, the head won't move)
My rule of thumb:
I use Auto-Lock Heads on jackets or where I don't want the zipper to open or close easily.
Non-Locking Heads I use for bags or tents or where little boys are indigenous to the zipper.