Screwgun Kit Autofeed Yes Chuck Size 1/4 in Hex Voltage 18.0 V Brushless Motor Yes Battery Capacity 4.0 Ah Features Allowing the Thumb and the Index Finger to Control the Operation Belt Clip for a Convenient Hold Easy-to-use Lock-On Switch -Allows for Extended Operation Extend Drive -Activates Motor only when the Bit Senses Pressure for Increased Runtime and Less Noise LED Light -Illuminates Low Light or Dark Work Areas Well-balanced Grip Ideal for Comfortably Holding the Tool