Review on Shimano Brake Bleed Kit with 100ml Mineral Oil, Bleed Block/Rotor Correction Tool, 4 Allen Wrenches, and 7mm Wrench - Compatible with All Shimano Brakes by Greg Greiner

I would give this 5 stars for a full set but to be honest a 6mm allen key is 5.5mm is 4. I could take pics but I'm tired. I use 6 to remove the front wheel, 5 to tighten the stem cover, 4 to tighten the stem bolts. The 6 that came with this set is 5, 5 is 4. That's weird. (That's why I rated it low for "thickness" - I think it's a silly category). It worked great, delivered quickly, but why the keys? Really strange - I've never seen anything like it.