List Of Conforming Driver Heads - The R&A

How to Use The List of Conforming Driver Heads
The List of Conforming Driver Heads identifies the models and lofts of all
driver heads that have been submitted for evaluation to The R&A and/or
United States Golf Association and have been determined to conform to the
Rules of Golf. It is updated by 08:00 (EST) every Monday for USGA
jurisdictions and 00:01 (GMT) for R&A jurisdictions.
Driver heads are listed in alphabetical order by manufacturer or by product
name, depending on which PDF list you have printed. Each model is listed as
a separate entry with corresponding lofts and identification markings that are
essential to determining whether the driver listed is the same as the driver in
question. There are sometimes only subtle differences in the markings
differentiating two different models of a driver head, e.g. one model may have
a degree symbol (conforming) and a similar model could be without a degree
symbol (USGA non-conforming or R&A non-conforming in 2008), and those
differences vary from manufacturer to manufacturer. As a result, if all
markings of the clubhead do not match exactly to a club that is in
question, it may be a different model and you should check the Non-
Conforming Driver List (R&A 2008) to determine whether it appears
there. If you have any question regarding the conformance status of any
club, please contact the R&A or USGA for further assistance.
A link to an image of each driver included on this list is available through the
searchable online database by clicking the 'View Photo' link. Please note that
only the image of the driver head's sole is provided, therefore, it should only
be used for reference purposes. There are often models that have identical sole
markings but have different face, crown, toe or heel markings. The sole
markings alone are not enough to conclude that the clubhead in question is the
model listed.