I acquired my Singing Rock anchor brake from Tom Furey in 2012.
My Singing Rock is 48 mm. long, 90 mm. wide, 9 mm. thick, and weighs 52 g. The Singing Rock is a forged aluminum anchor brake. The five small holes are each 12 mm. in diameter. The large hole facilitates attaching this brake to webbing.
The front is stamped "Singing Rock CE 0639" and "0599." The rear is stamped "USE ROPE | UIAA ø10.4" with a circle around the "|."
The Singing Rock is essentially the same as the Climbing Technology and the braking portion of the Mammut Klettersteig.