... Name: zinc alloy handle /stainless steel handle /Door & Window HandlesAbility for the material of this kind of handle: Grade 3.6 ... C60600,C17200,etc Alumimum 100,5052,6061,6063,etc Ability for the surface finish: Electroplate Zinc plated(while,colour,dacroment ... coating,etc Polishing Grinding and polishing,etc,except mirrorfinish Ability for the tolerance: Roundess 0.002mm Cylindricity 0.003mm Roughness ...