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Threaded bolt holes and other re-entrant surface features are often difficult to inspect because of geometry and accessibility problems. Similarly, fine holes are virtually impossible to inspect by conventional techniques without sectioning. Microset compounds are not only flexible but they have high elongation values when stretched and also significant fracture toughness. It is therefore possible to extract Microset replicas from re-entrant holes and from holes as small a .010 inches (250 microns) diameter without damage, even from holes exhibiting significant surface irregularity.
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