The universal box-end fits 6-point, 12-point, square, E-Torx, Spline, and partially rounded hex fasteners. Open end allows the wrench to be slid into positon from the side of the fastener. Set includes 10 wrenches covering sizes 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 17 mm, 19 mm.
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