Raw Vintage Tremolo Springs Set of 5 Features/Spec (Quoted from the website) Current springs used in Fender Stratocasters, etc., are stiff and have strong tension, so they are usually used with 2-3 springs. However, these springs are designed to be used with 5 or 4 springs, with reduced tension to achieve stable arming, a delicate torque feel, and a thick vintage sound. If you are considering an upgrade, why not try changing the springs to Raw Vintage Tremolo Springs before changing your pickups? *We recommend using a set of 5. Reasons to recommend: Changes to a thick, sticky sound! By using springs that are 0.8mm thicker than the current ones and have weaker tension, you can obtain the rich overtones and thick, resilient, and sticky sound that vintage guitars have. Also, the sustain will be improved. Smooth arming! With 2-3 springs, the burden on each spring was large, sacrificing the smoothness of the arm feel. By increasing the number of springs with weaker tension, you can get a smoother and more comfortable arming feel. Stable tuning! By using 5 springs, the burden on each spring is reduced, and the reproducibility of the arm return is improved, resulting in more stable tuning. ▶︎About transactions. After purchase, there have been several instances where the receipt evaluation was not given, or there was no communication after purchase, causing anxiety. Please follow the manners and rules of Mercari. Also, those who wish to purchase with an evaluation score of 1-5, please comment before purchasing.