Q68 Series of Hook & Step-by-step Shot Blast Machine could be used for shot blast and rust removal to the workpiece in a range of certain dimension. The workpiece after cleaned has no residue gravel, scale and rust, showing clean and bright metal surface, which could improve paint quality of workpiece and expose surface defect of workpiece to the effect that unqualified workpiece could be sorted out. This series is mostly applied to fire gas cylinder, acetylene cylinder and liquefied gas cylinder.