Although not widely introduced in Japan, these are ARM brand locking tuners, 3:3 chrome, new and unopened, which are highly regarded overseas for their balance of price and quality. Like Magnum Lock, you lock the strings by turning the dial on the back of the tuner. This model is compatible with the general 10mm peg hole diameter. Please refer to the images for detailed dimensions. In Japan, Musiclily is highly regarded as an alternative to GOTOH, but in terms of price, build quality, and functionality, these tuners feel like they sit between GOTOH (around 10,000 yen) and the Musiclily "Pro" series (around 4,000 yen). They will be sent unopened, still in the manufacturer's vacuum-sealed packaging. In addition, I will include one "Fretwrap" black S size (worth about 800 yen) to cut out unwanted string noise and equalize the sound quality of open and fretted notes. ※ The outer packaging may be either hard or soft depending on the lot (the contents are the same).