Internal (Hilti) HUS-H

The SIW 18T impact wrench delivers maximum efficiency when fastening metal bolts, wood lag bolts, and concrete screw anchors. It achieves superior performance in the number of fastenings per battery charge, and the motor provides maximum torque when needed. Cordless Power Care technology monitors each battery individually to prevent deep discharge, overcharging, and overheating ensuring the lithium-ion batteries can be used to full advantage. Hilti Inc. 800-879-8000.