This is what i know as a punisher. Since if you do it wrong it will hit you in the rib. Most people stick and old shaft or plain stick in the put in of a club. It really is helping me get the proper fell. One problem is that you have to start with the lab pre-set before your back swing
I too am a punisher. Just ask my kids!
I think lab must be lag. I saw an instructional where you hold a dowel along the grip extending past your left side at address, which pre-sets some wrist angle, and forces you to keep it otherwise it will dig into your left obliques.