?DTM-A1 TOWA Digital Tension Gauge Guide Device Sewing Accessories For “L”” Type Bobbin Case Ma 7T”

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 IncludedBrand: TowaOrigin: Japan
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.