The D914 Automatic Impact Tool is the only combination impact and torque tool designed to meet your wire termination requirements. The handle of the D914 is specially designed to accommodate your existing D814 blades, the new screwdriver, and adapter blades. There's no need to carry a different tool for each block or function. The D914 meets all industry requirements for wiring 110, Krone, BIX, and 66 blocks.