VESSELSingle End Go-SAI Bit [No.GS5P-03] (Assorted 5PC Set) (Japan Import)

I use these in my Vessel ball-grip bit driver handles and the ratcheting ball-grip driver. They do not work with just any standard bit insert or locking chuck, as the base of the hex is longer than the standard in the US. They do work with magnet only retention (no retaining ring), and the Wiha Centrofix driver because it's made to lock onto double-ended bits. These are great quality bits. I now have many different ones.

Wish I had known about these made in Japan bits sooner! Very nice fit and finish. Can’t speak about their durability yet. So far have tried them with a Wera 838 RA-R M that has a Rapidapter and they lock down nicely without any play.

This is a great product, very nice quality per small bets. This is a special tool per small jobs.

The black 0 bit is the perfect fit for removing the screws of the mic mount on the Sony FX3 and FX6, among other Sony cameras. I purchased these, along with some of the VESSEL JIS screwdrivers that have not come yet, but will be keeping them both to have on hand. Almost stripped one of my screws by using small Philips head drivers I had on hand, but they DO NOT WORK, as they are not snug enough. Buy these VESSEL JIS screwdrivers/bits instead!

Why does the yellow one look different from the other 4? That is kind of annoying to me.They seem to be JIS and fit small screws great. I can hold the screw horizontal and the bit will stay in the screw head. Absolutely amazing fit.The indent in the shank is 13mm vs what I consider the normal so they won't lock into a quick change type of bit holder. I'm still searching for a quick change holder for these.

Quality tools love them very much

A step above in terms of fit and finish. More expensive than others, but not dramatically so.

I use these in the Vessel 220 premium power screwdriver and love them.