guys with a weak grip type and punch or push elbow using angled or pressing toward vertical hinging...very...very soft wedges....
I know PGA Tour/Champions Tour Player....Pat McGowan hit them for me every day for 4 years at Pine Needles...
Oh yeah check out Kevin Stadler's flop...not many better at that shot in the game ...
he showed me his "no" knuckles grip ...thumb quartered to the Front... then use standard/Double wrist action in the backstoke then use a 'flip " release