... custom inquriy 4,8-10 work days punch with flat Specificationspunch with flat Type circular, Square Header , hexagonal , R-shaped…punch ... punch with flat Surface TreatmentTIN TICN TIALN CRN ..punch with flat Length Tolarance+/-0.01punch with flat Diameter Tolerance+/-0.002punch with flat HardnessHRC61°-63 ... size ,for example:M2.0,D 14*25.4,The surface coating type ,for example:Tin,Ticn5,It is the best ...