Impact Extension Bar 1/2" 75 mm Proline 18471

The Proline Impact Extension Bar 1/2" 75 mm (model 18471) is an accessory for impact wrenches and heavy-duty socket sets that extends reach to recessed or hard-to-access fasteners. Built for impact use, the extension bar provides reliable socket retention and transfers high torque while resisting shock loads. Its compact 75 mm length balances reach and control for automotive, industrial, and maintenance applications.

Advantages

This impact extension bar is made from chromium-molybdenum steel to resist breakage under repeated impact and high torque conditions. The 1/2" drive interface is compatible with standard half-inch impact sockets and offers secure detent or ball retention to keep sockets in place during operation. The short 75 mm length reduces flex and improves access in confined spaces while preserving tool stability.

Suitable for

• Automotive repair and wheel, brake or suspension work where bolts are recessed
• Industrial maintenance and machinery servicing with tight access points
• Construction and assembly tasks requiring impact-rated extensions

Key specifications

• Drive size: 1/2"
• Length: 75 mm
• Material: chromium-molybdenum (Cr-Mo) steel
• Designed for impact use (suitable for impact wrenches)
• Retention: detent/ball-style socket retention

How to use

Attach the 1/2" drive end of the extension bar to the anvil of the impact wrench until the retention ball engages. Fit the appropriate impact socket onto the opposite end, ensuring secure retention before applying torque. Position the socket on the fastener and operate the impact wrench per the tool manufacturer’s instructions, using controlled bursts to avoid over-torquing. After use, remove the socket and extension and inspect for signs of wear or damage before storage.

Usage recommendations

Use only with impact-rated sockets and tools; do not use with hand ratchets or non-impact sockets. Inspect the extension bar regularly for cracks, deformation, or wear, and replace if any damage is found. Follow proper torque guidelines for the fasteners you work on and wear appropriate personal protective equipment during impact operations.