This started as a review of the inexpensive Hozan JIS screwdriver set, but the more we got into it, the more confused we became. We first covered the subject of JIS screwdrivers in 2011 in the Vessel JIS Screwdriver Restoration Kit Review, then again in 2013 with the Vessel JIS Screwdrivers Review. We have continued to receive questions about those last two JIS screwdriver reviews, with many webBikeWorld readers telling us they either can’t find real JIS screwdrivers or that they don’t think there’s a difference anyway. I actually communicated with a representative from Vessel Tools, who was one of the major manufacturers and distributors of JIS screwdrivers and bits. He said that Vessel stopped making JIS screwdrivers a few years ago, because their current lineup will work with both Phillips and JIS screws. At the time, I didn’t ask the reason, but after quite a lot of time spent photographing and measuring a variety of so-called JIS screwdrivers and bits over the last few weeks, I’ve come to a conclusion. My theory is that modern manufacturing techniques can now grind or machine or otherwise make a tool bit with much more precision than the old pressed steel screwdriver types...