3", Corded, DuraSpin, DS-300AC, Collated Screw System Tool, Uses 7/16" Through 3" Screws, Designed For High Volume, High Speed Screw Applications, Built In Extension To Adjust Tool Height To The Proper Height For Standing & Driving Deck/Flooring Screws, Comes With Complete Tool, 2 Spare Drive Bits, Nose Pieces & Carrying Case.