The senco ds5525 dura spin cordless screwdriver uses 18v li ion batteries and its powerful 2500rpm high torque motor provides plenty of power for hard woods cement board and subfloor drives screws from 25 55mm in length has smooth drive operation and a variable speed trigger with lock and reverse that allows you to control the rpm of the tool corner fit indexing technology allows placement of screws into tight places which are unreachable by any other auto feed screw guns ideal for applications