... :Carbon steel or CR-V 2.Surface:Polish,Chrome-plated,Nickel plated 3.Handle:rubber cover 4.Size:4"-48" Wrench1. Material: 45 ... #Carbon steel or CR-V material 2. Surface: Chrome plated, Micro ... '',6'',8'',10'',12'',15'',18'',24'',48''4. Handle : Heavy duty handle with rubber cover5. Heat Treatment: Auto Temperature Control,45#:HRC39 ...