Tension is one of the most frustrating things about sewing and quilting. This tool helps to make it little easier by removing one element out of the equation. Tension is a balancing issue with Thread. If you can set your bobbin tension exactly to specifications then you are only dealing with the upper tension assembly to balance your threads. This Bobbin Tension Guage removes the guesswork by enabling you to set your pressure correctly. A must have tool to add to your sewing studio!