Number of gears: 16 mountains (1/4 side),18 mountains (5/16 side) Size ("HEX"):1/4x5/16 Total length (L;Mm): 138 Spanner width (Small: d1/Large: d2;Mm): 20/23 Thickness of small spanner part (a1;Mm): 15 Thickness of large spanner part (a2;Mm): 17 Weight (g):105