Features and Benefits:5000 Strokes per minute. Will accept any saw blade including "Sawzall" type blades. Universal Quick Change Blade Reatainer. Patented Recipricating Crank Mechanism Motor. Can cut up to 1/4" steel or 3" steel pipe. Rear Exhaust;The AIRCAT 6355 is a Super Duty Air Saw that will accept all blades including "Sawzall" type blades. It features a universal quick change blade retainer for easy change of blades. It has a patented recipricating crank mechanism motor for durability. It can cut up to 1/4" steel of 3" steel pipe. It has a rear exhaust and a dual speed design for control and safety.