Sprag Clutch or One Way Bearings integrate a sprag type freewheel into the 6200 bearing range. This creates a one way bearing or anti-reverse bearing, which will transmit torque from shaft to housing in one direction and allow free rotation in the other.
CSK Bearings come in 3 basic designs:
"CSK.." - One way bearings
"CSK..2RS" - One way bearing with rubber seals
"CSK.. PP" - One way bearing with keyways on inner and outer race for increased torque