We are offering automatic hand held type screw tightening systemsfeatures :compact, light weight, easy to use. precision torque adjustment. swift feeding distance up to 1 meter. screw tightering speed up to 20 - 40 pcs min. suits m2 - m6 screw. vibration control with sequence control. push to start screw drivertool shuts off when torque is reached. spring balancer for easy handling.