DTM-A1 Digital Tension Gauge

* Very simple to use with no installation;

* Compact design with easy-to-read LED display;

* Provides 12 times the measuring range of analog Towa gauages;

* Interchangeable inserts allow body to be used for "L" and "M" Style bobbin cases.

If you wish to measure both kinds of bobbin cases, you must purchase the additional M- Style insert (TM-502);

* Batteries Not Included

Includes: Digital Gauge Body (DTM-BD) plus holder for L-Style Bobbins (TM-501)

You can use this gauge to preset the tension on each bobbin case.
To make sure every bobbin case change is the same and eliminate the need to run
a pre-test on your sewing project for loose, or tight stitching.