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40mm Diameter.
For use on watch hands and miniature parts whilst repairing. 10 hole sizes: 0.80 to 3.00mm
Measurement with Nos. and MM. Complete with a range of 18 key sizes from # 000 to 18.
Brass with hardwood handle.
Key sizes: 5-6, 7-8 and 10-12. Put chuck in the handle and slowly release the mainspring.
One side threaded to take pendulum rods; for antique tall case clock movements.
Set of 4 Keeps mainspring in wound position to keep under control.
Gauge 18-27; Packet of 10.
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