Monadnock Model PR-24XTS 24" Polycarbonate Expandable Baton The Monadnock PR-24XTS Expandable baton is a two stage positive lock baton with a trumble stop side handle fastened to a one and 5/16 inch diameter aluminum frame which has a black anodized finish. The expanding shaft is positively locked into position ensuring that the baton will not inadvertently close.