The Speedway 2 in 1 Die Grinder/Cut Off Tool features a 1/4 inch air inlet that produces an operating air pressure of 90 PSI and an air consumption of 5 CFM. This 2 in 1 tool is the perfect tool for all kinds of grinding, cutting, or shaping. This tool has a 20,000 RPM no load speed, and collets sizes of 1/4 inch and 1/8 inch. This set comes complete with everything you need to get you started on your project. Included in this set: 1 air tool, 2 cutting wheels, 10 mounted stones, 1 safety guard, 2 open end wrenches, 1 cutting wheel shank, 1 Allen wrench, 1 nipple, 1 collets, 1 mounted stone holder. All of these accessories are neatly organized in the included blow mold storage case.