HiKOKI DH36DMA/J3Z 36V Multi-Volt Cordless SDS-Max Hammer Drill with Brushless technology is part of the HiKOKI 36V Li-ion Slide-on Battery Range. With reactive force control function. Reactive force control (RFC) - When a sudden load is applied to the tip, the slip clutch is activated, or the controller built in the tool body stops the motor and alleviates the phenomenon that the tool body is swung.