Hitachi Power Tools WH10DCL 10.8-Volt Lithium Ion Micro Impact Driver: * Impressively light-weight and compact * Optimized handle dimensions for a secure grip and ergonomic comfort * Quick change 1/4" hex chuck for simple bit replacements * Responsive variable speed trigger for complete control during intricate operations * Electronic feedback provides power control for equal torque and r/min in both forward and reverse * Free-standing design allows impact driver to stand on its own when not in use * Externally accessible carbon brush and replaceable armature greatly prolongs tool life * Battery charge indicator light warns the user when run-time is getting low * Includes two1.5 Ah H" x P batteries deliver steady power during every charge * Patented charger circuitry prevents overheating and power loss