... slotted bladequality standard:1.appearance,smooth,no defects on the surface,.no blisters,exfoliations ,cracks,no distortion.2.blade ... material are made out of Chrome vanadium steel with content of C-0.46-0.54%,Mn-0 ... %,V-0.1-0.2%;-Carbon steel with content of C not less than 0.45%3.hardness:HRC48, ... torque testPacking: export cartons. screwdriver set with socket bits in the saddlebag