The senco ds5550 dura spin cordless screwdriver is a compact 18v li ion powered tool with a powerful 5000rpm high speed motor providing the ultimate in performance and versatility for the most demanding professional drywall installer drives screws from 25 55mm in length battery power provides the freedom to work without the aggravation and safety concerns that come with power cords includes sencos patent pending corner fit technology that eliminates the screw placement challenges of other auto f