Good fits well and is ideal as its a good brand and is unlikely to damage your tools. If you want to send the blade back for sharpening this is great as it allows you to undo and send the blade only, while you use spare blades sold by Mr Palosanto. If you already have a 1.5mm wrench you dont need this one. But i found it cheap and handy to have with the tools.
I have other wiha tools. just bought the palosanto tools that use this 1.5mm Hexa wrench.