Majacraft's uniquely shaped yarn gauge is ergonomically designed to fit comfortably in your hand. It is laser cut from New Zealand Rimu so is both beautiful and precise. The yarn gauge can be used to determine both the twists per inch and wraps per inch. The extra hole allows you to tie it to your wheel or even use it as a key ring. Yarn gauges are invaluable little tools for spinners, weavers, and knitters