The senco ds5550 dura spin screwdriver is a compact well balanced machine thanks to its 5000rpm high speed motor it offers outstanding performance for the most demanding professional drywall installer with a smooth drive operation and a variable speed trigger that allows you to control the rpm of the tool includes sencos patent pending corner fit indexing technology that allows placement of screws into tight places that are unreachable by any other auto feed screw guns drives screws from 25 55mm