ITW Red Head WS-G Trubolt Wedge Anchor with Hot-Dipped Galvanizing. Wedge anchors feature a type 18-8 stainless steel split expansion ring and a threaded stud bolt body and integral cone expander, nut and washer. Anchor bodies are made of hot-dipped galvanized carbon steel. The exposed end of the anchor is stamped to identify anchor length. Stampings should be preserved during installation for any subsequent embedment verification. Use carbide tipped hammer drill bits made in accordance to ANSI B212.15-1994 to install anchors. Anchors tested to ASTM E488 criteria and listed by ICC (formerly ICBO) and SBCCI. Anchors are listed by the following agencies as required by the local building code: UL, FM, City of Los Angeles, California State Fire Marshal and Cal Trans.