CKPSMS Brand - TOWA Digital Bobbin Case Tension Gauge Compare to TM-1 L-Style (DTM-A1+TM-501)

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This is a TOWA Tensiometer with a "L" type bobbin insert holder You can see the size on the picture! TM-501 bobbin inserts USE FOR SMALL BOBBIN CASES "L" Style.

Compact design with easy-to-read LED display provides 12-times the measuring rage of prior Towa units

Measures tension of both bobbin case thread and upper thread with one compact unit.Battery operated (3 AAA battery, not included)

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.