Even the best engineer needs a good adjustable from time to time!
Finding a good one is harder than it should be. If you can get a good used vintage one, preferably a U.S. made tool, it will be better than most new ones. Personally, I think the vintage Crescent are about the best ever made, but there are other very good ones.
Of the new, there’s Bahco. Loved by many, but I’m not convinced the current tools, made in Spain, are the quality of the original Swedish tools. But they are not bad, and inexpensive.
They offer an upmarket version, with a plastic grip. Very similar to the tools they make for Snap On. Similar, not identical. Are they better quality than the basic models? Don’t know. Are they the same quality as the Snap On. No, they are not as nicely polished. Are they the same steel, same heat treatment? Who can say?
Chrome, and coloured grips, are all available.
The other Spanish maker is Irega. I have a few of these, and they seem decent. They manufacture under their own name, and for several European tool manufacturers. Are the tools produced for other companies the same as their own brand? I suspect it comes down to how much they pay. I have several Stahlwille ones, and they seem to be very good.
If you are opting for Japanese, then Lobster seem to be popular. I’ve seen these but not used them. They seem decent.
I have usec the Top “Hyper Zero” and they are very nice tools. I’d say a step up in quality. The model numbers denote the jaw opening. The 25mm is approx 6 inches long.
Best of the bunch is probably the Nepros, but only available in 10 inch. Lovely though.
