Many of the zipper bracelets sold to stimmers are cheap plastic that break quickly. Bracelets made with better zippers often don’t have a clasp that will hold up to repetitive stimming.
This bracelet is made with a brass YKK zipper with a ring pull big enough to accommodate most finger tips. The clasp is magnetic with a bayonet nut connect lock. This clasp will not come undone while working the zipper and is easier to fasten than a lobster clasp.