This tool set includes the 11-in-1 Multibit Screwdriver & Nut Driver (Cat. No. 32500) and a GFCI outlet tester (Cat. No. RT210). The versatile 11-in-1 Multi-Tool has everything the professional needs. The integrated screwdriver / nut driver shaft holds 8 popular tips and converts to 3 nut driver sizes. The blades are interchangeable for quick and easy switch out. The Cushion-Grip handle allows for greater torque and comfort. The GFCI Receptacle Tester is designed to detect the most common wiring problems in standard and GFCI receptacles. A convenient chart on the tester helps determine wiring condition in outlet, based on LED lights results. Conditions indicated: open ground, reverse polarity, open hot, open neutral, hot/ground reversed.