21PCS Carburetor Jet Drill Bits Pin Vise Set, Numbered 61-80 Mini Jeweler's Chuck Vice, Fine Tiny Miniature Metric Micro Wire Nano Tool For Jewelry Bead Making Crafts Orifice Drilling Wood DIY Carving

Serviceable tool for the price. For reference, I bought this set to enlarge carburetor jets in a Honda gx390 clone, and the largest bit is about the size of the stock main jet. Probably useful for smaller engine mains, and I am hopeful it will work if I need to adjust the pilot jet. Happy to have it in the toolbox, but a set with larger bits will probably be more useful for the average user.

Great bits. Have used a few times.

The drill bits are sharp and seem to be decent quality. The chuck of the pin vise however is made of brass and is fragile, mine has already broke. A pin vise with a stainless steel chuck would have been a better option. All in all the price is worth the drill bits alone.

Most of the replacement carbs for small engines run lean. Need this to get them to run the engine better. Very small round file set is also good to have.

I ordered the 20 piece number drill bit set with pin vise. There is literally now point on half of the bits (no grind on the end - just straight across). I think they are unusable. The pin vise will not grip the smallest of the bits, and the slot is not centered (will not drill without wobble which is precisely what you don't want with small drills). It's not worth my time to return the item.

Lacking instructions, it took me some time to understand how to open the bit container. Cut off the tab used to hang it on a peg board, only then can you slide the lid over to select the desired bit. The collet in the handle is cut very far off center, meaning if I spin the handle in my fingers, the drill bit wobbles a lot. I don't know if that is by design or poor manufacturing quality. Not unusable, but annoying. Overall, not bad for $10, but something to consider.

Great kit

Just what I needed for cleaning small equipment engine carburetor jets. Remember when using this that they are tiny and fragile so go easy when using them or you will break them.

The pin vise is pretty crude and can be more hassle than help it grabs but wont let go I had to fiddle with it to release the bit. Otherwise worked as advertised was able to drill out a jet for my snowblower to eliminate surging or having to run it on choke.