The DOT Die Set Hand Tool #22-RHTNS-4RR is a precision manual grommet die set designed for secure installation of #4 stainless steel rolled rim grommets and spur washers. Crafted from solid 304 stainless steel, it offers corrosion resistance suitable for outdoor and marine environments. This heavy duty hand tool features an interlocking teeth mechanism that pierces most fabrics and sets grommets in a single action, delivering durable fastening for banners, tarps, covers, tents, awnings, and protective gear. While requiring more force than standard grommets, it ensures a rugged, lasting hold for industrial and outdoor fabric applications. Packaged with detailed dimensional specifications, it supports efficient fabric fastening with a rolled rim grommet setter built to last.