How to effectively advertise a simple tool... prove how the mechanic, or modern car owner needs to do an impossible job - changing the damn sparkplugs in a transverse mounted engine bay, or boxer engine bay

the one job that makes a grown man set his coffee down and just stare at the engine.

It's spark plugs. And it's the reason a dealer can look you in the eye and charge you seven hundred dollars for a part that costs fifteen. 

Here's what nobody tells you about a boxer engine. The cylinders lie flat on their sides and the spark plugs point straight out at the frame rails, an inch and a half of air between the plug and a solid steel beam. The front two you can reach. The back two you cannot. 

The worst one, the rear plug on the driver's side, sits buried behind the battery tray and the wiring brackets, where your hand goes in and your knuckles come out bleeding.

A swivel socket on two extensions flexes under load and walks off the hex. A stubby flex-head ratchet has maybe five degrees of swing before the handle hits the frame rail, and five degrees is nothing on a plug that's been in since the factory. 

A universal joint binds up and twists off the head every time 

The service writer will tell you $700, give or take, to change four spark plugs. 

But... have you ever heard of a chain bar.  A chain, sealed in the bar.  It stays dead square on the plug, so it can't rock and round it. The only reason that back plug is a dealer job is there's no room to swing a ratchet at it. Nothing to do with the plug. It's the room.

The maker is wild bear tools

https://wildbeartools.com/products/extension-wrench

FWIW, anything so utterly replicated by cheap imitations, especially when they are even duplicating the colors and appearance, must be quite damn good. I advise against buying tools made of Chinesium.