Llaves fijas dobles, 6 x 7 mm, 8 x 9 mm, 10 x 11 mm, 12 x 13 mm, 14 x 15 mm, 16x 17 mm, 18 x 19 mm, 20 x 22 mm, 21 x 23 mm, 24 x 27 mm, 25 x 28 mm, 30 32 mm