Hilti SD 4500-A18 CPC Cordless High Speed Drywall Screwdriver - 3497783 World's First Cordless Drywall Screwdriver Capable of Serial Production First Choice for Exterior Use 4200 RPM for the Power to Outperform Others on the Market Innovative Directional Venting Helps Prevent Drywall Dust from Blowing into Operator's Face