Features: Full titanium construction. Hole for split ring or lanyard attachment. Compact and lightweight design. Description: The Thumper from Toor Knives is a lightweight but fully functional pocket defense tool. The solid metal construction makes for a reliable non-edged ring that gives you the ability to punch through tough obstacles. Attach the Thumper to a keychain or a neck lanyard for a Self Defense implement that is always close at hand!