Review on BGS Crowfoot Spanner Inches 1757 23 by Jonathan Brendemuehl

So it's not really a 23mm wrench, it's a 23mm box wrench! You know, that's the size not available in all metric box wrench sets (at least in the US). My Chinese Harbor Freight compressor has a swivel nut that shouldn't be there! 23mm! So I'm glad I found it. This article appears to be mislabeled so to be clear, flare wrenches are open-end wrenches that are not just straight, they have little knobs on the end to grab the nut and stop you from rounding it (this article) . Especially useful for hydraulic lines, compression fittings, etc. Sometimes all you need is a straight wrench (regular wrench or regular claw) as these knobs can work against you when trying to loosen a regular nut. uncomfortable position. Oh, and a wrench is called a wrench in the US. Hope that's all! Update: Added a few photos so you can see the difference: a claw key on the left and a standard key on the right