Air Chipping Hammer, Industrial, Shank Size 0.680 In., Round Shank Type, 1480 Blows per Minute, Stroke Length 4 In., Average CFM @ 15 Second Run Time 7.2, 29.0 CFM @ Full Load, Air Inlet 3/8 In., Min. Hose 1/2 In., Overall Length 18-7/8 In., Required Pressure 90 psi, D Type Handle Type, Grooved Barrel with Spring Type Retainer RestrictionsNote: When operating a chipper, always be sure that the chisel is held securely against the work surface and is never allowed to "free fire" or allow the chisel to strike the retainer. This practice could damage the retainer and break the barrel. Chipping HammersMore blows per minute, or smaller stroke length means that the tool will work faster. Fewer blows per min. or longer stroke length means more power from the tool.Required pressure: 90 psiIngersoll Rand 3Y546, 3Y571, 3Y574, 6Z571, 3Y545, 4Z260, 3Y441, 3Y433, and 3Y445Special plated piston reduces wear and extends life. Forged steel throttle handle.