Interchangeable blade dynamometric screwdrivers with fixed mechanical torque for right-handed controlled tightening in series production and repetitive applications. Can also be used for unscrewing operations with a maximum force 30% higher than the fixed torque. Features: - Clearly audible click when factory set torque is reached - Can be used with adapter for 1/4" hexagonal shank bits DIN 3126-C 6.3 (Optional) - Can be used with adapter for 1/4" socket wrenches (Optional) - Can be used with extra thin interchangeable blades Series 2859 (Optional)