The combination of Hitachi’s HXP Lithium Ion battery technology and an advanced impact mechanism give the 10.8-Volt Lithium Ion Micro Impact Driver a high torque-to-size ratio for convenient operation and performance. Lightweight and compact the driver delivers 930 inch-pounds of torque and gets into tight places. The WH10DL is designed for convenience, control and comfort. A quick change ¼-inch hex chuck allows for simple bit replacements and a responsive variable speed trigger provides complete control during intricate operations. The well-balanced tool weight and a properly positioned tool center of gravity keep the user’s hand and forearm in alignment to reduce fatigue over time.