This is an OEM CRG Axle. It is the Black Reinforced 50mm axle that comes in most full size CRG chassis.
+R Stands for Reinforced. A reinforced axle has a sleeve inserted where the Shifter Gear goes on the axle to prevent it from crushing.
Keyways not included
Uses (2) 2 pegged keyways
Uses (2) 3 pegged keyways