Our grease gun has many advantages than others similar products on the market, 1. vent valve 2. grease release valve 3. relief valve(safety valve) 4. new resettable fuse 5. new Anti-jamming circuit 6. self-locking button 7. LCD battery display We have exported our grease gun to many countries in big quantity. Hope to find a way to cooperate with you. ------------- Dezhou Great Industry CO.,LTD. Add: No.587 Jinghua Road, Dezhou, Shandong, China. Tel: 0086-534-2565718 Mob: 0086-13336277395 Fax: 0086-534-2388728 Email: dezhougreatsales4@163.com dezhougreatsales4@hotmail.com Skype: catherine-0423 Web: http://www.greasegun.cc/