1.Material:CRV,S2 2.Excellent heat treatment,high hardness,high flexiblility 3.Chromed 1.13PCS Impact Driver Set2.Item:TC-0043.Bits size:S8x35:PH1,PH2,PH3,PH4,PH2,H5,H6,H8,H9,SL4,SL5,SL6,SL84.Bit material:S2,Cr-v,45# are avaliable5.Metal box 13PCS Impact Driver Set Professional tools