Snap-on's 1/4" Recessed Square Drive Micro-Cordless Screwdriver, No. CTS661SK, employs interchangeable shanks and bits. Features 100 in-lbs of torque output, twin-beam headlights illuminate work area, built-in brake stops, quick 30-minute battery charge for less down time, over current protection protects the electronics, under voltage protection will not overdraw the battery, built-in gauge lets you know the state of the battery charge, screened motor keeps debris from entering critical components, over and under temperature protection keeps tool operating at peak efficiency, glass-filled nylon housing for durability, and an oversized forward/reverse cushion toggle style variable speed trigger for one-hand operation to toggle quickly from forward to reverse.