Extension Bars

An extension bar is a hand tool that has a square drive on each ened and is used to extend the connection between a socket and a ratchet, torque wrench, T-handle or any other similar square drive tool, which enables the operator to access hard to reach fasteners.

Extension bars have various uses, such as flexible extension bars for use when a fastener is at an awkward angle, impact extension bars when an impact wrench and impact socket are being used and insulated extension bars are for use when the operator is working on potentially live electrical equipment.

Mechanics, DIYers and engineers all use extension bars when they are working on hard to reach fasteners, or fasteners that are in a tight space.

Frequently Asked Questions about Socket Extension Bars

What are socket extension bars and their uses?

Socket extension bars are designed to connect between a ratchet, torque wrench, sliding T-handle (or any other similar square drive hand tool) and a socket, to extend the reach of the operator who is trying to access fasteners in deep or confined spaces. They come in various lengths and with different drive sizes, depending on the socket or hand tool that the extension bar is being used with.

What is a wobble extension and when should I use one?

A wobble extension bar has a slightly rounded-off drive end, allowing the socket to pivot up to a maximum if 15°, which allows the operator to access fasteners at slight angles or in tight spaces, where a straight extension bar won't fit.

How do impact extension bars differ from standard extension bars?

Impact extension bars are specifically designed to handle the high levels of torque and vibration that are produced by impact wrenches. They have thicker walls than standard extension bars and have drive sizes up to 1 1/2", which can cater for accessing hard to reach fasteners even with very high torque impact wrenches.

Do extension bars come in fixed and flexible types?

Yes, fixed extension bars maintain a straight line, while flexible versions can bend slightly to access awkward angles, offering greater versatility in tight or obstructed areas.

Can an extension bar affect torque accuracy?

Yes, there is potential for torque accuracy to be impacted when using a torque wrench if the extension bar, socket and torque wrench are all not properly aligned. Always use a fixed extension bar to minimise torque errors, as a flexible extension bar or wobble extension bar will not be able to provide an exact torque transmission.

Can I fix an extension bar if it cracks and reuse it?

We would never recommend welding an extension bar if it snaps or cracks to reuse it. The weld may not be as strong as the rest of the extension bar, which means it has a weak point and makes it potentially dangerous to use, especially at higher torque values.