Tool Part: This tool part is a spring coil extension rod made for wrench use, with a cylindrical flexible body and metal end junctions for practical socket handling.Function: As a flexible extension, it helps transfer twisting force in tighter positions where a straight tool cannot reach, extending the working range of your wrench setup.Connection Design: The square drive extension rod has 12.5 mm square drive interfaces at both ends, creating a secure fit for compatible wrench and socket connections.Anti-Drop Feature: The connector head uses a steel ball anti-drop design to help keep the socket in place during use, reducing the chance of slipping at the joint.Practical Use: This wrench extension rod is shaped for stable access in compact work areas, with a clamp-groove diameter marked 21 mm for clear fit reference.
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