Toledo Metric Hex Key Set. Manufactured from heat treated Vanadium steel with industrial black finish. Features standard hex and â??ballâ? hex designl end allows improved access to application and up to 25 Degree working angle for increased speed and easy of entry. 7 Piece set Metric supplied in a storage magazine. Sizes; 2.5 x 90mm, 3.0 x 100mm, 4.0 x 110mm, 5.0 x 115mm, 6.0 x 140mm, 8.0 x 160mm, 10 x 180mm.