Senco DS300-S2 Duraspin 2500 RPM Collated Screwdriver with Extension Kit DuraSpin collated screwdriving system with extension kit 2,500 rpm high-torque motor drives screws from 1-5/8 to 3 inches Easy depth of drive adjustment; trigger lock with reversing function Includes flooring extension, 2 spare drive bits, carrying case Weighs 16 pounds shipped; 1-year warranty