Black & Decker 12 Volt Lithium Drill/Driver with Stud Sensor Holds Charge for 18 Months 12 Volt Lithium drill driver with stud finder and 11 position clutch Compact size for getting into tight spaces LED light illuminates project area Stud sensor detects studs through walls up to 3/4 inch deep Lithium always ready, holds charge for 18 months