Gotoh Stealth Keys are the smallest and lightest tuning keys in the world! They weigh in at only 11.9 grams (.026 lb) each! That's the equivalent of only 1/2 to 1/3 of the weight of most standard guitar machine heads. These machine heads let the instrument truly sing by allowing it to resonate to it's full potential and reduces the weight of your guitar significantly. Trickery you say? Don't be fooled by the size and weight, these are made to last! By using high quality aluminum alloy, stainless steel, and brass materials.These little guys can stand the test of time.