Magnetic Bit Socket: Equipped with a strong internal magnet, the driver securely holds 4mm bits in place, allowing quick bit changes and minimizing the risk of bits falling out while working. Comfortable Non-Slip Grip: The handle features a knurled surface that enhances grip and control, preventing slips during use. Even during prolonged sessions, it ensures steady performance without hand fatigue. Lightweight Aluminum Alloy Body: Crafted from aluminum alloy, the handle a lightweight feel while maintaining strength and resistance to wear-perfect for long-term use and easy handling during delicate work. Precision 4mm Hex Compatibility: This screwdriver handle is designed specifically for 4mm hex bits, making it ideal for precision electronics repair tasks such as fixing phones, laptops, cameras, and more. Compact and Portable: With its slim, pen-style design, this bit driver handle fits easily in tool kits, drawers, or pockets. A great for technicians, DIY hobbyists, and repair professionals on the go., Weight: 0.0881849048 pounds, Manufacturer: Takingup_E58_5581698