The Discraft Challenger OS is a overstable Putter disc.
It has been assigned a Speed of 2, a Glide of 3, a Turn of 0 and a Fade of 3 by the manufacturer (Discraft)
We have the Discraft Challenger OS in Putter Line and Soft Putter Line plastic in stock.
Also note the additional information about the plastic and the manufacturer in the additional information tab.