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This hand expansion reamer is designed to create precision threads in metals such as steel and aluminum with minimal warping or damage. Its 3/4 diameter and 0.006 max expansion ensure it can accommodate various materials while maintaining a tight fit. The straight shank construction allows for easy use in hand tools like drills, while the 3-1/2 flute length provides excellent chip evacuation and a smoother cut. This reamer is ideal for industries such as automotive repair, aerospace manufacturing, and general machining where high-quality threads are essential for optimal performance. With its compact size and precision finish, this hand expansion reamer delivers accurate results in tight spaces and difficult-to-reach areas.