Socket bit, Proxxon hex 1/4" H4 (PR23745) — 4 mm hex insert

Proxxon hex socket bit 1/4" H4 is a 4 mm hex insert designed for 1/4-inch drive ratchets and bit holders. Manufactured for measured engagement with hex fasteners, this socket bit suits repair, assembly and precision tasks where a secure fit and reliable torque transfer are required. The compact 1/4" drive size makes it compatible with a wide range of compact ratchets, interchangeable bit holders and torque-limited drivers.

Advantages

The socket bit provides accurate hex engagement to reduce rounding of fasteners and enables controlled torque application for delicate components. Its hardened steel construction delivers wear resistance and long service life under repeated use. The standard 1/4" drive form factor allows quick changes between bits and compatibility with common hand and powered drivers, improving efficiency in workshop and hobby environments.

Suitable for

• Mechanical repairs on small machines and equipment
• Assembly of furniture or fittings requiring 4 mm hex fasteners
• Electronics, instrumentation and hobby projects with compact fasteners
• Maintenance tasks where a 1/4" drive and precision fit are needed

Key specifications

• Insert size: 4 mm hex
• Drive type: 1/4" (6.35 mm) square drive
• Material: hardened steel (wear-resistant construction)
• Design: socket bit for removable bit holders and ratchets
• Intended use: hand and low-torque powered drivers

How to use

Fit the 4 mm hex socket onto a compatible 1/4" drive ratchet or bit holder until it seats securely. Position the socket over the hex fastener and apply steady torque, avoiding sudden impacts when working with delicate components. For powered drivers, set the appropriate torque limit and run at low speed to prevent over-tightening. After use, inspect the hex faces for wear and store the bit in a designated holder to maintain alignment and accessibility.

Usage recommendations

Use the socket bit with the correct 1/4" drive tool and avoid excessive torque beyond the fastener or tool rating. Regularly check the bit and fasteners for rounding or wear; replace the bit if deformation is observed to maintain safe and precise operation.