This 3/8" Square Drive Wobble Extension Bar (450mm) is an offset extension for 3/8" (9.5mm) square drive socket systems, designed to reach fasteners in deep or awkward positions where a straight extension or a universal joint cannot be used. The wobble feature gives slight angular freedom between the socket and the drive, allowing access to bolts at shallow angles while maintaining engagement with the socket.

Manufactured from heat-treated chrome vanadium steel (Cr‑V) and finished with a polished, corrosion-resistant chrome plating, the bar delivers strength and durability suitable for workshop and industrial use. The tool is produced to the dimensional conventions for 3/8" square drives used across DIN/ISO/BS standards for hand tool drive sizes, ensuring interchangeability with standard 3/8" sockets, ratchets and torque tools. The bar measures 450mm overall and features a male 3/8" square drive on one end and a corresponding female recess on the other; the wobble section permits approximately 15° of off‑axis movement for improved access in confined spaces.

This extension is commonly used in automotive repair, commercial vehicle maintenance, plant and machinery servicing, agricultural equipment workshops and general industrial assembly. It is particularly useful where long reach is required and fasteners are recessed, obstructed by surrounding components, or located at slight angles relative to the access point. The 3/8" drive size makes it suitable for medium-duty applications where a balance of reach and torque control is needed.

Key benefits include good corrosion resistance from the chrome plated finish, high tensile strength and impact resilience due to the Cr‑V material and heat treatment, and compatibility with the wide range of 3/8" sockets and accessories. The wobble action reduces the need for multiple changeovers between straight extensions and universal joints, speeding up service tasks while preserving secure socket engagement.

Draper Tools Group D reference DR16748. Duchy Fasteners stocks 3/8" square drive extensions in a range of lengths and pack sizes; contact us for availability of single items or bulk packs and complementary socket and ratchet fittings.