SeeMore Giant Putters - Entire Line (@THPGolf)
Zach Johnson - "Makin' It Look Easy!" - Birdie - Round 2 - "Tip of the Hat to the Crowd" (74ft Putt) -

SPi Staff Instruction/Fitting Tip - Face Balanced at Impact and GIANT Series putters

Nowadays in the media you are starting to hear different terminology about "people wanting the putter face to return to square without any manipulation."  This type of technology has always been in play with a SeeMore putter.  It has been used to win the 1999 US OPEN (Pinehurst - Payne Stewart) as well as the 2007 MASTERS (Zach Johnson) and 2015 OPEN Championship (Zach Johnson). Here is a great list of SeeMore putters that are face balanced at impact on