Screwdriver Bit, Wiha T10H 25.4 mm Steel Tip, 4 mm Shaft Diameter

Replaceable Wiha T10H screwdriver bit with a 25.4 mm steel tip and a 4 mm shaft diameter designed for precise engagement with T10 fasteners. The bit fits common bit holders and screwdriver handles that accept 4 mm shafts, offering a compact solution for tasks that require a short, durable T10 tip. Its construction focuses on maintaining tip geometry and resisting wear during repeated use in confined spaces.

Advantages

The bit combines a hardened steel tip and a solid shaft to ensure accurate fit and long service life. Its 25.4 mm tip length provides access in shallow or recessed fastener locations while the 4 mm shaft diameter delivers compatibility with a wide range of bit holders. The precision-machined tip reduces cam-out and improves torque transfer for small T10 screws.

Suitable for

• Electronics assembly and repair
• Small appliance maintenance
• Precision fastening in automotive interiors and dashboards
• General household fastening where compact T10 access is needed

Key specifications

• Drive type: Torx T10H (hollow-ground/high-precision geometry)
• Tip material: hardened steel
• Tip length: 25.4 mm
• Shaft diameter: 4 mm
• Compatibility: standard 4 mm shaft bit holders and screwdriver handles

How to use

Insert the 4 mm shaft into a compatible bit holder or handle until it seats securely. Engage the T10 tip with the corresponding fastener, ensuring correct alignment before applying torque. Use steady, even pressure to avoid slipping and remove the bit from the holder after use to inspect the tip for wear. Replace the bit when the tip shows rounding or deformation that impairs engagement.

Usage recommendations

For best results, select a torque-limited driver or use controlled manual force when working with small Torx fasteners to prevent damage to the screw head or the bit. Store the bit in a protective case to avoid tip damage and keep it dry to prevent corrosion.