Wiha Micro Flat Screwdriver Bit 28 mm 4 mm Hex 3.5 7000406035

The Wiha Micro Flat Screwdriver Bit is a high-precision tool engineered for delicate fastening applications, featuring a 28 mm length and a 4 mm hex drive form. Designed with a 3.5 size flat tip, this bit provides an exact fit for miniature screws, making it a reliable choice for electronics repair, professional assembly, and intricate mechanical work where accuracy and durability are essential.

Advantages

This micro flat screwdriver bit delivers exceptional precision and a secure fit, which significantly reduces the risk of cam-out and damage to delicate screw heads. Crafted for professional durability, it maintains structural integrity under regular use in demanding environments. The compact 28 mm length and standard 4 mm hex drive ensure seamless compatibility with compatible micro bit holders and precision screwdrivers, allowing for efficient handling in confined workspaces.

Suitable for

• Precision electronics repair and maintenance
• Delicate mechanical assembly tasks
• Working with miniature flat-head screws
• Professional maintenance and laboratory equipment servicing

When it may not be suitable

This product is not designed for heavy-duty construction, high-torque industrial fastening, or driving large fasteners where standard-sized screwdriver bits are required. It is also incompatible with power tools or standard 1/4-inch bit drivers without an appropriate 4 mm adapter.

Key specifications

• Bit type: Micro flat
• Length: 28 mm
• Drive form: 4 mm hex
• Tip size: 3.5

How to use

Insert the 4 mm hex drive end of the screwdriver bit securely into a compatible precision bit holder or micro screwdriver handle. Align the 3.5 flat tip carefully with the slot of the target screw to ensure full engagement. Apply steady, controlled downward pressure while turning the handle gently to fasten or loosen the screw without stripping the head or damaging the surrounding components.

What to consider before purchase

• Verify that your existing screwdriver handle or bit holder is compatible with a 4 mm hex drive form.
• Confirm that the 3.5 flat tip size matches the specific dimensions of the fasteners you intend to use.
• Assess whether your application requires precision micro tools rather than standard-sized fastening equipment.

Usage recommendations: Always select the correct tip size and drive form to match your fasteners, and store the micro bit in a dry, organized case to prevent loss or mechanical wear.