Handmade in the USA. Laser cut from maple plywood. Want one tool to measure your WPI and your twist angle? What about having a built-in diz too? This spinners control card has guides to help you estimate your WPI as you spin. Simply lay the yarn along the grooves until you find a match. Or, calculate your WPI by wrapping over the two inch section. At the top of the tool is a protractor to help you measure your twist angle - plus a reminder of which way is S and which way is Z. There are five holes in varying sizes so you can use the tool as a diz, or thread a length of yarn or ribbon through the holes to hang from your wheel or keychain.