Both the USGA and R&A have ruled that the Elmer M1 Putter conforms to the Rules of Golf.
Since its official launch in August 2006, the M1 Putter has featured in a number publications around the world. Here are just a selection of examples:
SA Golf Trader - August 2006 [PDF, 160kb] Golf Digest (South Africa) - August 2006 [PDF, 240kb] Sports Illustrated (South Africa)- September 2006 [PDF, 197kb]
SA Golf Trader - August 2006 [PDF, 262kb] Golf Digest (South Africa) - September 2006 [PDF, 67kb] SA Golf Trader - October 2006 [PDF, 129kb]
M1 Putter 
