Screwdriver Bit Holder Wera 8790 HMB HF

The Wera 8790 HMB HF screwdriver bit holder is a compact, high-precision accessory designed to hold and drive screwdriver bits securely. Manufactured from Chromium-Vanadium steel, the holder combines corrosion resistance with the mechanical strength required for repeated use. With a bit shank compatibility of 9.53 mm (0.375") and an overall length of 23.5 mm, this bit holder is intended for tasks that demand stability and accurate bit positioning during screwdriving operations.

Advantages

This bit holder provides a firm holding function that reduces the risk of losing the screw while approaching the workpiece. Its Cr-V construction ensures long service life and dimensional stability under torque. The compact length and precise fit deliver improved control in confined spaces. Colour coding aids quick identification of size, which speeds up workflow and tool selection in mixed tool sets.

Suitable for

• Precision screwdriving in electronics assembly and small appliances
• General mechanical and maintenance tasks requiring a 9.53 mm bit shank
• Workshop and on-site service where compact, reliable bit holding is needed
• Use with manual or ratchet drivers that accept 3/8" (Zyklop-style) drives

Key specifications

• Material: Chromium-Vanadium steel for durability and corrosion resistance
• Compatible bit shank diameter: 9.53 mm (0.375")
• Length: 23.5 mm for compact handling
• Drive type: 3/8" Zyklop-style drive with holding function
• Colour coding: tool finder system for quick size identification

How to use

Insert the required screwdriver bit into the holder until it seats securely. Fit the holder into a compatible 3/8" drive ratchet or manual driver. Approach the screw head with steady pressure so that the holding function retains the screw during alignment. Apply torque smoothly and withdraw the holder once the screw is seated. For assembly tasks in confined spaces, the compact 23.5 mm length enables improved access and precise bit control.

Usage recommendations

Ensure bits are clean and free of debris before insertion and select bits that match the screw head precisely to avoid cam-out. Store the bit holder in a dry environment to minimise corrosion and inspect periodically for wear or deformation. Use the colour coding to keep a consistent set of tools and reduce selection errors during repetitive tasks.