Magnetic Screwdriver Extension Bar 3Piece Set Magnetic extension bar: A long lasting steel extension bar designed to reach tight spaces where standard screwdrivers cannot fit. The strong magnetic tip securely holds 4 mm hex bits, reducing the risk of dropping or losing bits during use. Comprehensive 3piece set: Includes three 123 mm magnetic extension bars, offering versatility for a variety of DIY tasks. Having multiple bars on hand helps maintain workflow without interruptions. Hex shank design: Each bar features a 4 mm hex shank for a snug, secure fit with compatible bits. This minimizes wobble and improves torque transfer for more efficient and accurate screwdriving. Robust steel construction: Made from strength steel, these extension bars resist wear and tear and maintain magnetic properties and structural integrity under heavy use in workshops or home projects. Compatibility and use: Designed for 4 mm hex bits, suitable for common fasteners used in furniture, appliances, electronics, and automotive projects that require reaching recessed screws. Use scenarios Reach and drive screws in tight spaces during flatpack furniture assembly, cabinet installation, or shelf mounting. Install or tighten screws for electrical outlets, switches, or fixtures located behind enclosures or in confined areas. Service automotive panels, engine bays, or workshop equipment where clearance is limited and space is restricted.