in a preferred embodiment , a lug - removing pneumatic impact - gun air blast - deflector divertable of forwardly directed exhaust air blast , of which detachably - mountable air - blast deflector structure is mountable on the gun in a position divertable of forward air blast laterally in each of opposite lateral directions , having a vertically extending apertured portion mounted by a forwardly - located horizontally positioned bolt and inclusive of a horizontal rearwardly - extending portion having a distal end portion distally angled rearwardly - upwardly , thereby forming a laterally and upwardly directed air path positioned in front of air - blast exits of the gun .