GYROS 20 PCS Mini Twist Drill Bit Set #61 to #80 w/Dome Storage Case, High-Speed Steel Wire Gauge Micro Drill Bits for Jewelry, Plastic, & Soft Metal | Small Drill Bits for Pin Vise & Rotary Tool

Great set for very fine work. I use them with a pin vice for carburetor jet work.

Excellent price for great variety. Well made and worked perfectly for the minute adjustments that I required.

They work good and fit in a electric drill spin straight I used them to drill out air bleeds on Carburetor parts and Accelerator pump nozzles . They did not fit good in a cordless drill but fit in my electric drill since it closed tighter .

Effective storage device. So far, the bits work (using then by hand).

If you use the correct chuck you will get good results. Spend the money and buy this and the right chuck. Bought a budget item that flex and cracked on me. Ruined my project. Otherwise I’m really pleased with the results.

These are must have for todays gas, work great for cleaning out pilot jets.

These micro bits are awesome!!!

Outside of the drill bits themselves, the most important part of this drill set is the case these tiny bits come in.At first glance, you might think the drill bit holder's clear cap has stepped accommodations to slip over the ends of the bits to hold them more securely in their correct base positions. You would be wrong. Only the two smallest bits have small dimples that capture the tips of the bits. The rest of the steps are just solid blanks offering little security in keeping the bits in proper sequence. I suspect at one time these steps actually functioned, but running production changes (the bits being made shorter ...as in cheaper) made the steps worthless . Treat the case carefully; always keep it upright and park it someplace where it's not going to get knocked about. The bits are shipped with a rubber band stretched around the bases of the bits, holding them in place to withstand the rigors of shipping and showing how little faith the manufacturer has in the ability of the case to retain the bits.I bought these bits as wire gauges to check carb jets so using them as drill bits will not be in the game plan. I suspect their durability will be sufficient for my purposes. I have no idea as to their accuracy; I would need to put a micrometer to them for that. For my use, the drill bits cover a wide range of jet sizes for the small engines i will be tuning.