Nut Driver Bit Wera 8790 HMC HF Zyklop

The Wera 8790 HMC HF Zyklop nut driver bit is engineered for precision fastening in both manual and non-impact machine applications. It features a hexagonal shank (25.4 / 2 mm, 1/2") and a 37 mm length, with a chrome vanadium construction and brushed chrome-plated finish. The bit includes a ball intercept ring and knurled base for secure handling, plus a holding function that keeps the fastener in place, protected by a steel ring around an elastic heat-shrunk tubing.

Advantages

The design provides reliable clamping of screws via two flexible locking balls and permanently elastic tubing that resists mechanical wear thanks to a surrounding steel ring. Colour coding and a large stamped size make the desired socket easy to identify. The combination of manual and non-impact machine compatibility reduces the need for multiple socket sets.

Suitable for

• Precision fastening with hand tools
• Non-impact machine drivers and power tools
• Work in confined or hard-to-reach spaces where one-handed screw retention is needed
• Professional maintenance and assembly tasks requiring durable bits

Key specifications

• Brand: Wera
• Model: 8790 HMC HF Zyklop
• Shank: 25.4 / 2 mm (1/2") hexagonal
• Length: 37 mm
• Material: Chrome vanadium
• Finish: Brushed chrome-plated
• MPN: 05003731001
• EAN: 4013288180964

How to use

Fit the 1/2" hexagonal shank into the compatible driver or socket. Place the bit over the nut or hex drive screw; the two locking balls and elastic tubing will retain the fastener so you can start turning with one hand. Use only hand tools or non-impact power drivers as specified; avoid impact tools to prevent damage to the holding mechanism and the bit finish.

Usage recommendations

For long service life, keep the bit clean and free of debris. Replace the bit if the holding tubing shows significant wear or if the hex profile becomes rounded. Use colour-coding to organise sets for quick access and to match the correct profile and size.