Magnetostrictive actuators for superprecision positioning in steps of 10-2 nm over a range of displacements up to 1m have been developed and investigated. The actuators generate forces up to 104 N and are suitable as force actuators in steps of 10 nm. Exact displacement is achieved by an active element made from Terfenol D alloy based on rare-earth metals with a giant magnetostriction. The actuators can be controlled manually without any additional power source or by using a computer. For manual control the minimum linear-displacement step does not exceed 0,6 nm, and when the device is used on a turntable the minimum angular displacement step is 15-10-3 angular seconds, while for computer control these quantities are 10-2 nm and 4?10-5 angular seconds respectively. Using the above mentionned micropositionners we developed several new devices, which may radically change the situation in various high-tech fields of modern technology.