General Tool’s 14-in-1 HVAC Multi-Pro Screwdriver has a rotating and retractable in-handle bit cartridge that functions as storage for six double-ended bits and one single-ended bit. Its shaft opening also serves as a 1/4” hex driver. It features an alloy steel shaft and its handle is made from engineered nylon/ABS. Its EZ-Guide Collar provides control by maintaining alignment between the screwdriver and the fastener.PM1014_Products_hand-tools_General-Tools-HVAC-Multi-Pro-Screwdriver-8142_300.jpg