3 Pack Screw Driver Bit Adapter Standard 6.35mm 1/4" Outside To System 4mm Inside Micro Bit Hex Socket Shank for Manual Electric Tool Adaptor Holder Precision Bits Set Screwdriver Converter

These adapters allows me to use my 1/4 driver to use 4mm tools.

I was impressed with them. I didn’t expect much for 5 bucks, but they are nice. I ordered another set.

There's not much to say other than the magnet is strong and they perfectly fit the 1/8" bits i was using.

El imán que trae es muy bueno

As described

Many 4mm bit handles are made from plastic. This adapter allows 4mm bits to be used with stronger 1/4" bit holders. The fit of Wiha 4mm bits in the adapter is a little loose but better than too tight.

This works well to convert bits from a security bit set or various small bits to standard size for use with a drill. I don't see these ever breaking. Good solid quality.

Exactly as advertised but I should've looked closer at my tools. I already had an adapter. Most sets come with them.

exactly what i was looking for , great to match mini bit with 1/4 torque wrench by example

These are very well made for the price. I have used a little bit this past weekend and never had any issues.

Extremely useful if you own precision bits. Have been using for past several months for fixing rc cars. Works as intended

Exactly right for special bits on a chuckless drill.

One is missing. Poor packaging. The ones received looks ok.