All discs are photographed upon arrival at our shop, letting you know exactly what your disc looks like.
Here's what Discraft has to say about the Challenger OS:
"The Challenger OS is a more overstable, flat-topped version of the popular Challenger. This putter works best for driving, throwing into headwinds, weaving forehand approaches, and tossing hyzer putts. It is overstable enough to meet a majority of a player's needs without becoming a meat hook."
Challenger OS: 2/3/0/3