Wiha 40620 Micro Hex Screwdriver Bit 3 mm 28 mm

The Wiha 40620 Micro Hex Screwdriver Bit is a precision tool engineered for delicate fastening tasks involving small hex fasteners. Featuring a 3 mm metric tip and an overall length of 28 mm, this micro bit is manufactured from high-grade chrome-vanadium steel and has been through hardened to ensure long-lasting durability and reliable performance in professional and hobbyist applications alike.

Advantages

This micro hex bit offers exceptional precision when working with miniature components. Its robust construction from high-grade chrome-vanadium steel provides superior resistance to wear and tear. The through-hardened treatment ensures the tip maintains its structural integrity even under repeated use, reducing the risk of slipping or damaging sensitive fasteners during intricate assembly and repair work.

Suitable for

• Precision electronics repair and maintenance
• Assembly of small mechanical models and devices
• Working with miniature metric hex socket screws
• Delicate hobbyist and laboratory equipment tasks

When it may not be suitable

This tool is not designed for heavy-duty industrial fastening, high-torque applications, or working with large screws that exceed its micro dimensions. Attempting to use this 3 mm bit for high-force tasks may result in tool damage or stripping of the fastener head.

Key specifications

• Tip type: Hex metric
• Tip size: 3 mm
• Total length: 28 mm
• Material: High-grade chrome-vanadium steel, through hardened
• Quantity: 1 piece
• Weight: 3 g

How to use

Insert the screwdriver bit securely into a compatible micro bit holder or precision hand driver. Ensure the tip is fully seated into the head of the hex fastener before applying rotational force. Maintain axial pressure straight down into the screw head to prevent cam-out and ensure smooth, controlled tightening or loosening of the component.

What to consider before purchase

• Verify that your existing driver is compatible with micro bits
• Check the required metric size of your fasteners to ensure a 3 mm tip is correct
• Confirm the 28 mm length is suitable for the depth of your working area

For optimal tool longevity and secure fastener engagement, always ensure the bit is clean and properly aligned with the screw head before applying torque. Store the bit in a dry environment when not in use.