Without Hole and with hole [Raw Material] 45# quality carbon steel,40CrV alloy steel [Heat Treatment] Auto Temperature Control,45#:HRC39-44;40CrV:HRC42-48 [Certificate] Information L Type Wrench Without Hole Finish:socket fully polished,handle sand blaster,chrome plated.Ni-Ni-Cr Type:Normal Packing:bulk,hanging card,color box