So far I have only got one use for it. Doing rear struts on a 163. Makes the job so much faster.
Old thread, but I found it before making an offer on a 3/4" Mac version of these wrenches. The post above cemented it, as there are 19mm bolts and nuts surrounded by a bunch of stuff when doing brakes and struts on my vehicles.
The thing is, you can use these types of wrenches just the same as you would a single flex ratcheting wrench, so you're not giving anything up – just adding a feature that you never know you'll need – until you need it.
Got the wrench for $16, including shipping. Never been used. Still in the tool truck wrapper. The Cornwell version of this on their website is $40.
Did I NEED it? Probably not, as I've done f/r brakes and rear struts without it. But I could see where it could come in handy. There are 19mm bolts all over both my vehicles. Probably some I haven't yet encountered. And of all the metric/SAE equivalents, 3/4 and 19mm are the closest. At that price, it seemed like a no-brainer purchase, to me.