Our companyâ??s profession the screw the pole and enctosure.Double shingling screw pole coagulating the manufacturing experience of more than ten years. Owing the pole drill press of ms bed. Large inside bore appropriation grinding machine 10ms# type quality with nitrogen nitride waiting technique equiping, usbermning abroad forerunner managing, with high standard design with nicety processing making the high quality set. the material chooses to use 38 GrmoAIA the surface difference of high-quality metal alloy steel can too acctding to the different material of different request choice can proceed nitrogen nitride, chrome, spray to draw the rigidity quality metal alloy the ***** designs reasonable. service life long.providied