| 摘要 |
A socket having a polygonal cavity at its front end and an inner drive tool unit in the recess. The set includes a single socket and a plurality of units of different sizes, each unit including a wafer and an inner drive tool element. All the wafers have the same external dimensions, but the inner drive tool elements are of different sizes. Another form includes a plurality of units, each including a socket and an inner drive tool element, semi-fixed together.
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