This limited commemorative edition GlassPutter is Inscribed with the signatures of Pittsburgh Steelers great Ray Mathews Sr. and his son Ray Mathews Jr. Featuring the Steelers signature colors of gold and black, it also comes with a certificate of authenticity and a padded head cover.To ensure protection of your glass putter, it's recommended to put the head cover on after use. You can clean your glass putter with any glass cleaner. Head cover included.