The CP7300RQC is a reversible 1/4 mini air drill with a keyless chuck. Perfect for getting into tight spaces. With an adjustable exhaust, this drill is excellent for drilling, honing, reaming and hole sawing. Spindle size: 3/8-inch-24; free speed: 2800 RPM; average air consumption: 4.1 cfm; air inlet thread: 1/4-inch NPTF; minimum hose size: 3/8-inch; sound dBA: 86; length: 5-inch; weight: 1.35 lbs.