TEKTON 2759 Mechanic's Screwdriver Set, 22-Piece Hardened and Tempered Chrome Vanadium Steel Shafts Corrosion-Resistant Chrome Plated Finish Precision-Machined, Vapor Blasted Magnetized Tips Comfortable, High-Torque Square Handles Hex Bolster for Wrench-Assisted Torque (on Most Sizes)