The Makita compact brushless cordless impact driver works with a brushless motor that delivers an operating speed of 3600 rpm and a torque rating of 1590 in-lb. Assist mode as well as two tightening mode helps in preventing screw cam-out and cross threading. Reverse rotation auto-stop functioning ceases the rotation and impact when the fastener is loosened. The 4-1/2 Inch long compact construction makes it easy to use in tight spaces. User can make use of four operating speeds to help in a wide range of applications. A power selector button is provided under the chuck to allow one-handed speed changes. Star protection computer controls safeguards the device from overloading, over-discharging and overheating. Chuck features a dual ball bearing design that minimizes bit wobble and run out. Both sides consists of LED lights to brighten up the work area. Brushless motor is controlled electronically to maximize the battery life and to keep the motor cooler. Extreme protection technology ensures great resistance to dust and water in harsh jobsite conditions. One-touch 1/4 Inch hex facilitates fast changing of bits and the metal housing increases durability.