We are Sheen Tzar Co Ltd From Taiwan. We set up a branch company in mainland China and also own the Taiwanese technology and the good quality . We are a manufacturer of 1) machinery as self-drilling screw forming machine, slotting machine, heading machine, self-drilling screw point cutting machine, thread rolling machine and dies. 2)And we also export self-drilling screws;self-tapping screws;chipboard screws;drywall screws. If you have any interest in our products. Please feel free to contact us, we are very pleased to hear from you.