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• Use for assembling the top and side wired temperature sensors, thermo switches and other components.
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• Also can be used for nuts and bolts of bent pipes.
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• Designed rail for storage.
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• Contents: 3/8" DR: 10, 11, 12, 13, 14mm.  1/2" DR: 17, 19, 21mm.
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• Width: 7.4mm, 8.8mm, 9.1mm, 10.5mm, 11.2mm, 13.3mm, 14.4mm, 15.8mm