The Sioux SDR10P4N4 Palm Pistol Grip Air Pneumatic Drill is a high torque, single item tool designed for automotive and industrial applications. Made in the United States, this drill features a variable speed trigger and a 1/2 inch chuck size for secure bit attachment. With a maximum speed of 400 RPM, this drilled is equipped with a keyed chuck key type and a 1/4 inch air inlet size, making it a versatile and efficient tool for various drilling tasks.