I tried freeing off the top of our bathroom tap using a bolt - with no luck. I needed a 14mm hex key and bought this and it worked instantly with a 17mm spanner. It is now in the tool box waiting for its next job.
Makita DTD171Z 18V Li-ion Cordless Brushless 4-Stage LXT Impact Driver Body Only
24 Jul, 2019
Small but powerful
This driver was much smaller than expected, but it does the job.
I had some tricky self tappers to put into stainless steel and it worked perfectly.
I was expecting to be able to turn off the impact, but that is not the case, although there are plenty of settings to cover most situations.