I'm selling these because I have extras. ※The images are samples. The number of washers and other details may vary. These are unused but are outlet items, so there may be scratches, dullness, rust, chips, peeling, paint lifting, uneven finishes, etc., from shipping and storage. Please do not purchase if you are looking for a pristine item. They are inexpensive, so please understand that they are not as perfect as Gotoh-made ones. Those who use Schaller products will understand, but this type bites when tightened and has some play when loosened. While the usability isn't perfect like Gotoh, it's a specification, and the tuning is stable after adjustment. I find them useful because they are cheap and reasonably functional. Screws are included. I think they can be used for both acoustic and electric guitars. 【Handling Precautions for Tuning Machines, Tuning Buttons, etc.】 ●Handle with care during installation to avoid damage. (Please be careful when tightening the mounting screws. Damage may occur depending on how tightly they are tightened. Also, align the screw threads of the mounting screws with the threads of the shaft before tightening. Tightening when the threads are not properly engaged can damage the threads.) Tuning buttons are stronger when thick and weaker when thin, so they are vulnerable to force from the vertical and horizontal directions depending on their shape, so handle them with care. ●If the tuning machines are installed on a guitar with a headstock thickness of 1.7cm or more (or a guitar that is too thin), the nut may not engage properly, and installation may not be possible. However, this is due to the buyer's circumstances, and returns are not accepted. (Please note that there are many cases, such as guitars with uneven headstock thickness, individual differences, and guitars with thick paint that increase the headstock thickness.) ●Also, the screw threads of the nuts, the screw threads of the buttons, and the mounting screws, including the screw heads, grooves, and resin buttons, are all delicate and therefore not very strong, so they are easily damaged. Please handle them carefully during installation. ●Nuts with weak engagement may have shallow grooves and may come loose. In some cases, harder nuts may bite more firmly, so try installing them first even if they don't turn smoothly. (If you try to force a non-smooth turning part to become smooth by friction, the grooves may be worn down, making the engagement shallow and causing it to come loose.)