Dude Machinery (Shanghai) Co.,Ltd is one of the leading doutec manufacturers and suppliers in China, you can get customized doutec, kenner, electric torque wrench, pneumatic torque wrench, backup wrench from our factory. DOUTEC POWER don’t want to be restricted on technical research any longer, but also have developed a series of professional torque tools for bolts tightening & loosening with its trademark DOUTEC POWER. The products are light, durable, precise, easily operated. During these years, through the continuous effort of the excellent technical sales team, the products have been sold throughout the world. Besides, DOUTEC POWER can customize non-standard bolts tightening & loosening solutions.