Hot Racing VTH125F CNC Aluminum Front Diff Lock: Twin Hammers Made by Hot Racing; Hot Racing is a United States based company; parts are sourced from Chinese producers All Hot Racing upgrade parts are direct replacements for stock components; additional parts are not required Hot Racing part number VTH125F; UPC 083745835045 This item works with: Vaterra Twin Hammers 1.9 Rock Racer RTR