Our factory specializes in producing all kinds of screw: triangular, trapezoidal, square, sawtooth-type, ball type, etc. Maximum diameter is 100mm and maximum length is 10 meters, the largerest of screw pitch is 6mm. And we can produce  multiple-threaded rod. Day of production capacity 10000m, precision thread more than two. If you have any questions, please do not hesitate to contact me.