BLACK+DECKER GCO12SFB 12-Volt Ni-Cad 3/8-Inch Cordless Drill/Driver with Plastic Imported 24 position clutch prevents screws from stripping Keyless chuck makes bit changing quick and simple Variable speed reverse for drilling and driving control Keyless chuck for quick and easy bit changes 24-position clutch for fewer stripped screws Ample power and variable speed/reversing trigger for optimal control in a variety of materials Stud Finder detects studs through walls up to 3/4-inch thick Lightweight and compact size allows you to drill holes and drive screws with ease.