The NSK Presto is an ultra precision oilless high speed air turbine carver. It is designed to run at 320,000 RPM's at 35 PSI. It requires a compressor capable of 1.5 CFM at 35 PSI and most compressors of 3/4 HP or larger are fine to run this tool. The Presto does not require oil and the chip air mechanism blows away the cutting powder to improve visibility as well as cutting efficiency. The Presto measures 5/8" diameter, 4 1/4" long and accepts only 1/16" shank burs. The basic set includes handpiece and 6' of flexible tubing. We recommend the kit with the Filter/Regulator/Switch for ease of use.