HVAC 8-in-1 Slide Driver Screwdriver/Nut Driver. Features Unique, patented head slides back and forth to switch from 1/4 to 5/16 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 and 3/8 hollow nut drivers, as well as #2 Phillips, 1/8 3mm and 1/4 6mm slotted screwdriver tips. Cushion-Grip handle for greater torque and comfort. Great for HVAC applications including thermostat installation and control work. Specifications Application HVAC. Handle Length 4-5/16 109. 5mm . Handle Type Cushion-Grip. Overall Length 7-1/2 190. 5mm . Shank Length 3-1/4 82. 6mm . Special Features Slide Drive . Tip Size Magnetic Hex Head 1/4 , 5/16 ; Nut Driver 1/4 , 3/8 ; Phillips #2, Slotted 1/8 3. 2mm , 1/4 6. 4mm . Weight 0. 50 lb 0. 2 kg . HVAC 8-in-1 Slide Driver Screwdriver/Nut Driver. Features Unique, patented head slides back and for th to switch from 1/4 to 5/16 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 and 3/8 hollow