Sizes: 6 x 7, 8 x 9, 10 x 11, 12 x 13, 14 x 15, 16 x 17, 18 x 19 & 20 x 22 mm. Each spanner fits into its own space in the holder, which is provided with a slot for wall mounting. the clear size indications ease finding the right spanner. Eight piece set complete with holder. to din 838 & iso 3318, with off-set heads of 75°.