Nut Driver Bit Wera 790 HMA Zyklop

The Wera 790 HMA Zyklop nut driver bit is a compact accessory engineered for precision fastening in confined spaces. With a hexagonal shank of 25.4 / 4 mm (1/4") and a working length of 23 mm, this bit is produced for accurate engagement with hex nuts and fasteners. Its lightweight construction (approximately 16 g) and standardized shank make it compatible with a wide range of bit holders and ratchet systems designed for 1/4" interfaces.

Advantages

The nut driver bit provides reliable torque transfer through a true hex profile that minimizes rounding of fastener heads. Its short length helps reach fasteners in tight assemblies while improving control during installation and removal. Manufactured with attention to dimensional accuracy, the bit delivers consistent fit and repeatable performance across repeated use.

Suitable for

• Automotive and mechanical maintenance where space is limited
• Assembly and service of electrical enclosures and control panels
• Furniture assembly and cabinetry work requiring a 1/4" hex interface
• General DIY tasks that require precise nut driving

Key specifications

• Shank type: hexagonal 25.4 / 4 mm (1/4")
• Working length: 23 mm
• Weight: 16 g (approx.)
• Material: hardened tool steel (manufacturing standard for drive bits)
• Compatibility: fits standard 1/4" bit holders and Zyklop ratchet systems

How to use

Insert the Wera 790 HMA Zyklop nut driver bit into a compatible 1/4" bit holder, ratchet or driver. Position the hex end onto the nut or fastener and apply steady torque, keeping the tool aligned with the fastener axis to prevent cam-out or rounding. For removal, turn in the opposite direction while maintaining secure contact between bit and fastener. Inspect the bit before use and replace if signs of excessive wear or deformation are present.

Usage recommendations

Use the bit with matched 1/4" drive tools and avoid applying impact forces or excessive torque beyond the bit and fastener specifications. Store in a dry toolbox or bit organizer to protect the hex profile and maintain fit accuracy.