Hex-Plus screwdriver bit Wera BIT 7.0 x 25 mm reinforced, type 840/1

The Wera Hex-Plus screwdriver bit 7.0 x 25 mm reinforced, type 840/1 is a precision replacement bit engineered for hex (Allen) fasteners. It uses Wera's Hex-Plus profile to increase contact surface with the fastener, reducing the risk of rounding and enabling more efficient torque transfer. The 25 mm length and reinforced construction make it suitable for work with both manual and powered bit holders in workshop and assembly environments where reliable, repeatable hex driving is required.

Advantages

The Hex-Plus geometry improves fit and reduces wear on fastener corners, extending both bit and screw life. Reinforced construction provides higher torsional strength compared with standard bits, lowering the chance of breakage during heavy-duty driving. The compact 25 mm length balances accessibility in confined spaces with controlled handling for precise insertion and removal of hex fasteners.

Suitable for

• Assembly and maintenance of machinery and equipment with hex socket fasteners
• Workshop repairs and installations using manual drivers or powered bit holders
• Furniture assembly and fittings where accurate hex driving is needed

Key specifications

• Bit profile: Hex-Plus hexagon profile to minimize rounding and improve torque transfer
• Size: 7.0 mm tip diameter suitable for corresponding hex socket fasteners
• Length: 25 mm working length for access in shallow recesses and controlled handling
• Construction: Reinforced design for increased torsional strength and durability
• Compatibility: Designed for use with standard 1/4" drive bit holders and quick-change chucks (manual and powered)

How to use

Select the 7.0 mm Hex-Plus bit and insert it securely into a compatible 1/4" bit holder or quick-change chuck. For manual work, use a suitable bit driver or handle; for powered applications, fit the bit in the driver or cordless tool and set torque limits appropriate to the fastener and material. Align the bit squarely with the hex socket, apply steady axial pressure, and rotate at a controlled speed to avoid cam-out. After use, inspect the bit tip for wear and store in a protective holder to maintain geometry.

Usage recommendations

Use the Wera Hex-Plus 7.0 x 25 mm reinforced bit where reducing fastener rounding and improving torque transfer are priorities. For high-torque or repeated operations, monitor bit condition and replace when signs of rounding or deformation are present to ensure consistent performance and avoid damage to fasteners.