... Snap,snap button 3.stainless steel snap button set 4.hand polished 5.stainless button head bolt SpecifIcation1.SpecifIcation: 50mm2.50mm Open Snap,snap button,stainless button ... steel ,alloy steel, heat resistant steel ,tool steel ,brass and aluminum ,according to DIN ,EN, ASTM, BS,JCSI. ... 3. Piece numbers: small, medium and large series.4. Process: cast, machining, turning, milling, ...