5 Pieces 1/4 to 4mm Bit Adapter, 6.35mm 1/4" Hex Outside to 4mm Inside Micro Bit Socket Shank,25mm Long Screw driver Converter for Manual Precision Magnetic Bits Tool

Excellent quality.

This adapter isn’t all that easy to find. I got them to use with my power screwdriver to adapt small hex for more a more torquey driver. Bought in a 5 pack as 2 cost almost the same.

Until I recently received a small screwdriver set for working on electronics, I wasn't aware there were smaller hex bits than the standard 1/4". I got a nice set of specialty bits for working on computers and electronics, but the driving tools available for using them is limited. So in order to use the more ubiquitous 1/4" ones that we all have, you need these adapters. It's exactly what I needed, and they give you four of them for a low price. Very happy with these, it's a simple adapter, but opened up a lot of possibilities for working with small specialty bits.

Got 5 pieces, but they are all a bit different in terms of the finish. Don't think these were manufactured with small tolerances. Hence, the 3 stars.

This adapter is great for enabling you to chuck your 4mm precision/security bits (e.g. from iFixit, Wiha, etc.) into your portable drill/driver, so you can quickly disassemble/reassemble gear. I particularly like that the magnet built into the adapter holds the bits in place. Not too much, not too little, just right.