Socket Bit Wera 8790 HMA 7 mm 1/4" Hex, 7 mm hex bit with 1/4" drive

Socket Bit Wera 8790 HMA 7 mm 1/4" Hex is a single 7 mm hex bit designed for use with 1/4" drive holders and ratchets. Manufactured by Wera, this hex bit provides a precise fit for hex fasteners, enabling reliable engagement and efficient torque transfer in confined spaces. Its compact form factor makes it suitable for assembly, maintenance and repair operations where access is limited and rapid bit changes are required.

Advantages

The Wera 8790 HMA 7 mm 1/4" Hex bit offers accurate geometry for secure insertion into hex sockets, reducing play and wear on both the tool and fastener. Its standardized 1/4" drive compatibility ensures quick installation into common holders, extensions and ratchets. The compact length and solid build facilitate access to recessed or tight fastening points while maintaining consistent torque transmission.

Suitable for

• Assembly of small machinery and equipment
• Maintenance and repair of electronics and household appliances
• Automotive interior and trim fastening tasks
• Workshop and professional tool kits for confined-space work

Key specifications

• Bit type: Hex (internal hex/Allen)
• Size: 7 mm hex
• Drive interface: 1/4" (6.35 mm) square drive
• Design: Single solid socket bit for drive holders and ratchets
• Application area: Tight or recessed fastening points, general assembly and repair

How to use

Select a compatible 1/4" drive holder, extension or ratchet and insert the Wera 7 mm hex bit into the square drive until it locks or seats securely. Align the hex bit with the fastener and apply steady torque, taking care to keep the bit aligned to avoid cam-out or rounding of the fastener. Change bits or attach extensions as needed for reach or leverage, and inspect the bit tip and fastener condition periodically to ensure safe operation.

Usage recommendations

Use the bit with tools rated for the required torque and avoid excessive force that could damage the bit or fastener. Keep the bit clean and free of debris, and store it in a suitable holder to prevent loss or tip damage. Replace the bit if signs of rounding, chipping or deformation appear.