Get strong sculpted arms and shoulders with the Shake Weight™. It's the revolutionary way to shape and tone arms. A Shake Weight™ workout of just six minutes a day can make all the difference. Based on a new workout technology called Dynamic Inertia, which ignites the muscles in your arm, shoulders, and chest, the easy-to-use Shake Weight™ increases upper body muscle activity helping to create toned, lean arms. Item measures 8" x 4" and weighs 2.5 pounds. Instructional DVD included.