Material:mid/low carbon steel,alloy steel Grade:Gr2,Gr5,Gr8 Size:M20-M60 Processing:hot forge(7years exp) Heat treatment MaterialMid/low carbon steel/alloy steel(45#,1045,40Cr)Sizemainly supply for M20-M60 or as per customer’s requestGrade4.8/5.6/5.8/6.8/8.8/10.9Surface treatmentBlack oxideMOQ50piecesPackagewooden case and pallet or as per customer’s requestExtensive experience in hammering, ...