VEVOR Air Hammer, 4500BPM Pneumatic Hammer with 40mm Stroke & 4PCS Chisels Round Shank, Lightweight & Compact Air Chisel Pneumatic Shovel Tool for Cutting Punching ScrapingProduct Features Powerful & Efficient This air hammer delivers 4500 BPM high frequency strikes and a 1. 57 inch stroke for strong impact force, efficiently cutting metal, breaking concrete walls, removing bolts and more processing tasks. (AVG. Air Consumption: 11 CFM, Air Pressure: 90PSI ; Air Inlet: 1 4 NPT) Easy to Use Designed with a responsive trigger and one button start function, this pneumatic hammer is simple to operate with no need to change