This is the patented dumbbell with quick release selectors that instantly adjust the weight on its bar, essentially giving you six dumbbells in one. Eliminating the clutter and expense of multiple fixed weight dumbbells, users add or release interlocking plates by sliding selectors to choose one of six weights (10, 15, 20, 30, 40, or 50 lbs.). A durable molded plastic storage tray clearly shows the weight selected and neatly stores unused discs. The dumbbell plates are made of cast iron with a heavy-duty plastic casing (front plate powder coated finish) that ensures longevity and are formed in a unique shape that prevents rolling when not set in the tray. The chrome plated handle has a knurled texture that allows the user to maintain a solid grip during exercises. Includes one 50-lb. dumbbell and storage tray. Overall dimensions 16 3/4" L x 7 3/4" H x 8 3/4" D.