Have two of the Milwaukee 12v screw drivers. Work great, hold a charge for a very long time, charge back up very quickly and plenty of torque to twist in even large screws. Their 3/8" drill is essentially the same tool just with a drill chuck would be an ideal boat tool, as well. Have an 8 year old 14v Bosch 3/4" drill with NiCad batteries that has done yeoman service. Would like to replace it with a Lithium battery drill but the damn thing just won't quit.