GRANDO DRIVE UNITS We offer the most suitable drive unit for almost any type of pool. For above-ground pool cover systems, we have 5 different drive units. For below-ground systems, there is a choice of 7 different units. Icon 1Drive Units for Above Ground Pool Cover SystemsHere you can find more information about the drive units for our above-ground pool cover systems. Icon 1Drive Units for Below Ground Pool Cover SystemsHere you can find more information about the drive units for our below-ground pool cover systems