This tool is developed with a sealed barrel to virtually eliminate sound.  It can be used near or in an occupied building during normal daytime hours with no hearing discomforts.  The tool has no live load in the chamber until indexed onto the surface.  The spacer system virtually eliminates fish hooking, spaulding and bending.  The spacer cushions kickback with minimum recoil.  The tool can be used on poured concrete, steel and masonry joints.