Continental ContiTech Positive Drive belts and pulleys for nearly every conceivable industrial drive application where precise shaft synchronization is required. Positive Drive belts can also be used as an alternative to problem V-belt and chain drives. MXL for small business machines, office equipment, electric equipment. XL for business machines, instruments, sound equipment, etc. L for fraction power-rated motor applications such as in-home appliances, small tools, pumps, blowers, etc. H For machine tools, pumps, fans, presses, motor generator sets. XH for medium torque applications on heavy industrial equipment. XXH For high torque applications on heavy industrial equipment.