Delivered 8 Y bits of good quality (no burrs or similar): Y000, Y00, Y0, Y1, Y2, Y3, Y4 and Y5. This gives us a set for all common applications from Gameboy to the toaster. Bits hold good in the screws. I've been buying so far no regrets, even the price of just 10 is really good. Normally you get for only a single Y screwdriver, then I will buy but rather just a complete Bitset.