Socket Insert Wera 8790 HMA 1/4" (6.3 mm) Chrome Vanadium Steel

Wera 8790 HMA 1/4" (6.3 mm) Chrome Vanadium Steel socket insert is a compact drive accessory engineered for use with 1/4" (6.3 mm) ratchets and drivers. Manufactured from chrome vanadium steel, the insert is designed to provide a precise fit on fasteners and effective torque transfer while resisting wear in repeated workshop, automotive, and maintenance applications. Its small form factor makes it suitable for tight spaces and inclusion in portable tool sets for professionals and hobbyists.

Advantages

The chrome vanadium steel construction delivers a balance of hardness and toughness that extends service life under regular use. Machined engagement faces ensure secure seating on compatible fasteners to reduce rounding and slippage. The compact 1/4" (6.3 mm) drive size allows access to confined areas where larger drives cannot reach. The simple, standardized design is compatible with a wide range of 1/4" drive ratchets, extensions, and adaptors.

Suitable for

• Workshop assembly and disassembly of small fasteners
• Automotive interior and trim work where compact tools are required
• General maintenance, repair tasks, and portable tool kits
• Precision tasks on electronics enclosures and mechanical assemblies

Key specifications

• Drive size: 1/4" (6.3 mm)
• Material: chrome vanadium steel
• Type: socket insert for square drive tools
• Finish: machined / metallic finish suitable for workshop use
• Compatibility: fits standard 1/4" drive ratchets, extensions, and adapters

How to use

Select the socket insert and attach it to a compatible 1/4" drive ratchet, driver, or extension by aligning the square drive and engaging until it clicks or seats securely. Place the socket over the fastener head and apply torque using smooth, controlled motions; if using impact-style tools, verify the insert is rated for that use before applying percussive torque. After use, clean any debris, inspect for wear or deformation, and store in a dry tool organizer to prevent corrosion and maintain fit.

Usage recommendations

Use the socket insert within the recommended torque limits for 1/4" drive tools. Avoid applying excessive force with cheater bars or extensions that exceed the mechanical limits of the insert. For precise or delicate fasteners, use steady, controlled torque and confirm fit before full application to minimize fastener damage.