I just bought 8 of those as well, when i was looking them up i believe that royal precision makes them. Performance wise, i still dont know yet. Got mine cheap on ebay. $35 for 8.

Here we go-
"Royal Precision Diamond Rifle 25
Weighing as little as 110g, the Diamond Rifle 25 shaft is manufactured from 4145 high-carbon steel using a new quad-wall design throughout the internal structure of the shaft. This different wall-thickness design, combined with a 2.5-inch diamond pattern, produces a higher launch angle and lower spin rate for enhanced distance and overall performance. For more information, visit www.royalprecision.com." -Golf Tips (NovDec 2002)

Check out here, they are selling 8 for $108 I think
http://www.leaderboardgolf.com/close...ndparallel.htm

Help that helps out a little anyway.