Astro 7117 High Torque 90 Degree Offset Box and Open End Wrench Set, 12-Piece New 15 Degree offset design at open-end provides more convenient working space More extensive application range open-end. Contrived geometry provides better accessibility Proper fit-lateral force applying system. Allowing users to work with wider side of wrench to provide stronger torque with less stress Deeper accessibility ring head. Contrived bottom flare shape provides better accessibility for reaching confined spaced nuts 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19mm