Adjustable bracelets with a bolo closure work through a slide pulley through which both sides of the chain can be adjusted. These bracelets can be easily slid over the wrist and tightened by pulling the closure closer to the wrist, creating a smaller circumference of the bracelet with the excess chain dangling on the other side of the closure.
Adjustable knot bracelets are another option for adjustable slide closure bracelets. These bracelets are a continuous loop in which each side can be slid to tighten or loosen the fit.