Bosch SDS

[Farside]

That'll be a Bosch green though, not blue?

More grey and black. It was the GBH 12VRE iirc. Not much use now, as it got flooded, but in its day it was bloody good. Problem was, the batteries were farking pricey, which led to the discovery Makita batteries (as I also had some older slim battery Makita kit)
I did use it at the top of ladders, but it wasn't a lightweight.