CNC-machined, cast aluminum with a brilliant chrome finish for a great look and durability. Ergonomically designed and have symmetrical vibration damping rubber inserts with a convex profile to fit the palm of your hand for unsurpassed comfort while riding. Variable position rheostat switch gives the rider ultimate control over the degree of warmth produced. Perfect way to keep your hands comfortably warm while riding during cool to inclement weather conditions. Control switch for cruisers easily installs on any 1 in. handlebar in a convenient position of the rider's choice.