Black & Decker® GCO18SFB Cordless Drill with Stud Sensor & Storage Bag, 18VA powerful 18V motor makes this cordless drill ideal for a variety of tough household tasks. A 24 position clutch helps prevent stripped skus, and variable speed plus reverse offers extra control while you work. Includes a stud sensor that detects studs in walls up to 3 4" thick. Variable speed plus reverse for controlled drilling and driving in diverse materials Stud Finder detects studs through walls up to 3 4" thick 24 position clutch keeps screws