Integy Ti-Nitride 2.5mm hex wrench. Color coded sizes. Hex wrench tips have a high degree of tolerance to lock screws into place. Easily replaceable wrench tips, just loosen the set screw, insert new tip and tighten.
Length (including handle): 6-3/4" (172mm)
Wrench sizes: 0.05" - Silver, 1/16" = Black, 3/32" = Purple, 5/64" = Green, 1.5mm = Red, 2.5mm = Blue