WEDOO CNC EDM TOOLS CO. LTD quality manufacturer from China. 1. Using high quality raw materials of diamond ceramic , stainless steel 2. Produce by exprienced technician and engineers with Sophisticated machine equipment 3.High precision wire guide, Roundness and radius is tested by video measuring machine, tolerance -0, +0.02mm 4. Easy to assembly ,and high precision on cutting 5. Long lifetime , can be used 4 to 7 months http://www.edm-spareparts.com/supplier-240741-edm-machine-partshttp://www.edm-spareparts.com/supplier-369413-edm-jig-tools