OKNIFE MBS1 4mm Hex Bit Screwdriver Set, 9 PCS Durable S2 Tool Steel Double-Ended Bit Set with Eternal Pencil, Ideal for Opry, D1, U1 Pro Series and Other 4mm Hex Nut Drivers

Work fine. OKNIFE quality although who makes the bits I don't know. All neat and tidy.

Very good 4mm bit set that I use with a Wiha system 4 driver handle and 4mm bit set adapter. They work really well together.

This multi tool set is a must have. It works with the otacle and with the oknife u1 pro. Have it on a key ring with a carabiner and it helps with glasses and knives and any small screws. It also comes with a pencil bit which you can buy refill bits from amazon or olight directly. Lightweight super durable bits. Small storage footprint and excellent value.

Super Set zum immer dabei haben. Die Bits halten auch ein bisschen Drehmoment aus und brechen nicht gleich.

Omg!! This little bit set is amazing. And it works with the HOTO mini screwdriver even the pencil. I can decide if I keep the whole sleeve in my EDC or just run that bit set in the HOTO. Again this is very nice. The bits look and feel look great. Good quality at a good price.

I loved it. It is great for edc, combining it with an Olight/Oknife tool, to expand your capabilities, etc. I would recommend.

This bit set is perfect for what I need it for. Working on my RC trucks and maintenance on my pocket knives.