The senco ds7525 cordless dura spin screwdriver has a high power 2500rpm high torque motor with a variable speed trigger and trigger lock it has the capability to drive 25 75mm screws making it the professionals choice for driving a wide variety of screws into many different applications thanks to its cordless technology it can reach places where corded cant includes sencos patent pending corner fit technology that eliminates the screw placement challenges of other auto feed screwguns tool free