Klein 8-in-1 HVAC Slide Drive, Screwdriver / Nut Driver The Klein 8-In-1 HVAC Slide Drive, Multi-Bit Screwdriver / Nut Driver from ITS reduces the need to carry different tools when only one is needed. This uniquely designed with patented head slides back and forth to allow it to switch from 1/4" to a 5/16" magnetic hex-head screwdriver. The thumb nut locks the tip setting and also features a specialty bit for the installation or removal of common TR-4 Schrader valves. Ideal for a range of HVAC applications, including thermostat installation, this hand tool also includes a cushion grip for comfortable working as well as maximum transfer to torque power when working. Fits with: Nut Driver Sizes: 1/4’’ Magnetic, 5/16’’ Magnetic, 1/4’’, 3/8’’ Phillips Bits: #2 Slotted Bits: 1/8’’ (0.3 cm), 1/4’’ (0.6 cm) Other Bits: Schrader Valve Core Removal Key Features 8-in-1 Screwdriver / Nut Driver Unique Slide Back Head Thumb nut locks tip setting Cushion-Grip handle Specification: - Diameter