TM-3 Bobbin Case Tension Gauge
Fit "M" Style Jumbo Bobbin Case, Such as BC-DBM Series

* Very simple to use with no installation.
* Comes with complete instructions in maximizing the benefit of this tool.
* Provides accurate and consistent tensions.
* Much more reliable than the outdated and unreliable “drop” test.
* Measuring 0-400 grams of thread tension pull from bobbin case

Origin: Japan

This Bobbin Case Tension Gauge Use For Pre-Set The Tension On Each Bobbin Case, To Make Each Bobbin Case Have Same Tension , So Worker No Need To Do a Pre-Test on the Fabric For Loose or Tight Stitching.