Klein Tools 32596 Multi-Bit Screwdriver /Nut Driver,...

8-in-1 Screwdriver / Nut Driver with unique, patented head that slides back and forth to switch from 1/4-Inch to 5/16-Inch magnetic hex-head screwdriver
Thumb nut locks tip setting
Features a specialty bit for installation/removal of common TR-4 Schrader valves
Includes 1/4-Inch and 3/8-Inch hollow nut drivers, as well as #2 Phillips, 1/8-Inch (3 mm) and 1/4-Inch (6 mm) slotted screwdriver tips
Cushion-Grip handle for greater torque and comfort
Great for HVAC applications including thermostat installation and control work
U.S. patent 7,654,175 B2