| http://www.w3.org/ns/prov#value | - With that, the USGA decided it was time to make a change -- one that has also been adopted by other governing bodies, including The PGA of America and the R&A. Essentially, the USGA has rolled back the grooves on all irons (not just wedges), reverting back to the previously approved V-grooves -- V-grooves are the most common, but under the new rule the grooves do not need to be V-shaped.
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