Impact Extension Bar 400 mm 3/4" with Hole — Rockforce RF-8047400MPB

Rockforce impact extension bar 400 mm 3/4" with hole is a heavy-duty drive accessory designed to extend the reach of 3/4" impact wrenches and sockets. Constructed for impact use, the 400 mm length provides access to deep or recessed fasteners while the through-hole allows secure attachment with a pin or retaining ring. This extension bar is suitable for automotive, industrial and maintenance settings where higher torque and reliable connection are required.

Advantages

The extension bar is engineered to resist impact torque and repeated use, reducing the need to disassemble surrounding components to reach fasteners. Its through-hole ensures secure locking of sockets or universal joints during high-torque operations. The straightforward design and compatible 3/4" drive size make it compatible with a wide range of professional impact tools and accessories.

Suitable for

• Automotive repair and wheel assembly where lug nuts or bolts sit deep
• Industrial maintenance and machinery servicing with recessed fasteners
• Construction and heavy equipment servicing requiring extended reach

Key specifications

• Drive size: 3/4"
• Overall length: 400 mm
• Design: impact-rated extension with through-hole for pin or retaining ring
• Material and finish: heat-treated alloy steel with impact-capable surface treatment
• Compatibility: intended for use with impact wrenches, impact sockets and universal joints rated for 3/4" drive

How to use

Select a compatible 3/4" impact socket and slide it onto the extension bar. Align the through-hole with the socket or adapter retaining hole and secure using a suitable pin or retaining ring to prevent disengagement during operation. Attach the extension bar to the impact wrench square drive, verify secure connection, and operate the tool following the torque and safety guidelines of the impact wrench and socket manufacturer. Inspect the extension for wear or damage before use and replace if deformation or cracking is observed.

Usage recommendations

Use only with impact-rated sockets and tools of the same drive size. Avoid using cheater bars or modifying the extension; do not use the extension with non-impact hand ratchets. Wear appropriate eye and hand protection when operating impact tools and follow recommended torque limits to avoid overstressing the extension and connected fasteners.