For automotive and light maintenance applications. Durable and long lasting, with an all ball bearing construction and precision-machined steel gears. Self-locking throttle lever prevents accidental starting of motor. Precision-machined steel gears. Front exhaust helps keep work surface clean. Easy-to-use, integral safety-lock throttle lever prevents accidental start-up. Small and lightweight design provides easy operation greater access to tight spots. Strong aluminum housing withstands tough operating conditions. Tool comes with both a 1/4 in and 6mm collets and two wrenches