I agree about the Wolf-Garten tools, they are absolutely my favorites. Being able to change handles on any of them makes them so versatile. I've also got the longer poles and window cleaning attachments and to clean gutters.
My latest favorite tool is the blade I found to remove grass. I was dreading having to remove the grass from a 60' x 2.5' wide area in my back yard, but I really wanted to plant perennials along the fence. One of the areas I'd have to work around existing hydrangeas and didn't know how to get around them without damaging them. I tried with various shovels and it was back breaking and so slow. And then I found this magic tool that let's you work even close to existing plants without harming them. You just slice it into the ground and it pulls the grass up. I told my neighbor I was in love with a tool, he tried for a big area to remove grass that he was putting off, and he ended up ordering one of his own after that.
I was going to be happy if I cleared 1' a day trying to use shovels or other hand tools. I finished the 60' in 2.5 days and it was easy work. This is the blade, it just seems to grab the grass roots easily somehow.
https://www.amazon.com/dp/B01MA0I97V/