Folding Aluminum L-Shaped Key Organizer, Blue and Silver Dimensions: 2-3/4 x 1-1/2 x 5/8 inches; Weight (with no keys): 1 oz Barrell Outside Diameter: 3.5 mm Holds standard door keys and most car keys; Fits comfortably in pocket Includes washers (add or subtract as needed), three different size holding barrells (small-6 keys, ,medium-10 keys, large-14 keys), and a key ring attachment No fingerprints, Made from aluminum (1/16 in. thick) Keys rotate 360 degrees with comfortable resistance, Large keys rotate 180 degrees