Longer Service Life Had been proven by many facotry users, these tips are longer service life than others. Size Data Check Check the size data in listing photo before purchasing and avoid buying wrong tips. Easy to Use Heat quickly with base, good ability to hang tin, not easily oxidized. Tips Knowledge Listed few soldering tips knowledge on photos, but suggest to learn more soldering knowledge on how to do soldering jobs and maintain the tools., Manufacturer: Mcnhbdgg