TOMALL Brass Collet Mini Electric Grinder Quick Change Drill Chuck Bit Sets 0.5-3.2mm (1/64 Inch to 1/8 Inch) Shank Diameter 4.3mm / 0.17'' for Rotary Tools (Pack of 10pcs)

These adapters allowed me to use a wide variety of bits in different brand tools.

They work as advertised

Great for a variety of sizes of bits. However, the soft material it is fabricated from tends to meld them in place and if you use a pliers to remove it you end up ruining it. So just be careful when removing it and it should be fine. Great price for such a wide span of sizes, but very malleable.

Despite the warnings, I got the larger size than my Dremel uses. Good part is, I took them to my used tool dude and he gladly swapped them for the right-size, non-gold ones.

I purchased these for my hyper tough rotary drill and I would buy them again if I had to. They fit perfectly and hold the very small drillbits that I have for my crafting.

These have 4.3mm shaft which are required for a Dremel brand tool. Ordered some from China, Waited 4 months and they was supposed to be 4.3mm shaft but were 4.8mm. That is what fits China ""Dremel"" tool which is actually a WEN brand tool (maybe with some other sticker on it).

They advertise a smallest collet of .5mm in the set, see attached pic of that collet, not only non concentric but does not close down close to .5mm. Amazon provided a replacement set at no charge, that set was no better. As long as you don't need the 2 or 3 smallest ones all is good, I bought this set for that .5mm collet only, no other set had one that small and now I know why.

Tested it once and they seem fine.