Features: The hex shank bit holders set features quickly release selflocking mechanism and forgeds chrome steel construction, ensuring durability and deformation resistance for professional fastening tasks. Magnetic extension rod with double color handle provide secure bit retention and corrosion resistant performances through full body quenching treatments, ideal for repetitive screwdriving applications. Design for mechanics, electricians, and DIY enthusiasts requiring reliable torques transmission in automotive repair, electronics assembly, and household maintenance projects. Perfect for confined workspaces scenario requiring tool versatilitys from furniture assembly in home workshops to machinery servicing in professional garages. Universally 1/4in hex shank compatibility works with standard bit while the ergonomic antislip design maintains grip integrity during prolonged use in oily or high torques conditions. Specifications: Component:Chrome Steel Diameter:Approx.15mm/0.59inch Length:Approx.150mm/5.91inch, 100mm/3.94inch, 60mm/2.36inch Handle:1/4in Hex Shank Features: Selflocking buckle, easy to use, forgeds from chrome steel, resistant to deformation, fully quenched, anticorrosion and antirust, solid and durability, scratch and wear-resistant Application: Automotive repair, household maintenance Package Includes: 1set/3pcs Connecting Rod note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.