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The ScrewKeyDoo is the perfect tool for loosening and tightening the needle clamp screw on your Bernina Sewing Machines. Compatible with most models, but not with the new 700 and 800 series. Please see picture of needle clamp screw to ensure that this tool is compatable with your model.
**Use caution when tightening your needle clamp screw. Overtightening can cause damage to the needle shaft.