Abstract: A hexagonal wrench includes a body with at least one function end which is a twisted and equal-sided column. The twisted and equal-sided column includes a root section, an end section and a middle section which formed between the root section and the end section. A maximum twist angle is defined between the root section and the end section, and the maximum twist angle is equal to or less than 30 degrees. The root section has a first cross section and the end section has a second cross section. The first cross section is larger than second cross section.

Abstract: A hexagonal wrench includes a body with at least one function end which is a twisted and equal-sided column. The twisted and equal-sided column includes a root section, an end section and a middle section which formed between the root section and the end section. A maximum twist angle is defined between the root section and the end section, and the maximum twist angle is equal to or less than 30 degrees. The root section has a first cross section and the end section has a second cross section. The first cross section is larger than second cross section.

Abstract: An Allen wrench structure contains: at least one operating segment formed on a gripping handle and having plural hexagonal cross-sectional faces, wherein the at least one operating segment has a first cross-sectional face and a second cross-sectional face. A diameter L1 of an inscribed circle of the first cross-sectional face is less than a diameter L2 of an inscribed circle of the second cross-sectional face, and a working part of the at least one operation segment between the first cross-sectional face and the second cross-sectional face is conical. A misalignment angle ?1 is defined between the first cross-sectional face and the second cross-sectional face so that among six vertices of the first cross-sectional face and six vertices of the second cross-sectional face are defined six extending edges, and each extending edge is defined between each vertex of the first cross-sectional face and each vertex of the second cross-sectional face.