Made here at 'The Barn' by James this brilliant spinners control tool will help every spinner to spin their chosen yarn. No more guess work!  It shows the required thickness of the singles yarn in relation to the planned finished yarn weight so you will always know how to spin the single to ensure that you achieve your desired finished weight of yarn. It also has a protractor to check your twist angle in both the single and ply which helps to ensure consistency over an entire project spin.
Secured onto a large metal hoop for easy storage or for attaching to your wheel for ease of access.