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Square Adapter 107x107mm (4")

To drive in 4"x4" posts a pilot hole must be made in the ground first. A 2" pilot hole is the recommended size. If the ground is very hard or dry, fill the pilot hole with water and leave to soak before driving the posts into the ground.

Our Pilot Core Tool can be used to make a pilot hole, or alternatively an Earth Auger.


Internal diameter of 107x107mm. This adapter is suitable for driving 4x4" square posts.

Using a 6mm hex key to unscrew the 8 bolts & locking washers. Slide the current tube off the base of the Post Driver. Slide the new Adapter into its place and attach using the same bolts and washers. Remember to use a Locking Compound on the screw threads to stop them vibrating out.

Get the best results from your Easy Petrol Post Driver by using an adapter with the closest fit to your post sizes. Adapters are available for the Easy Petrol Post Driver in all shapes & sizes within 107mm round diameter. Custom sizes are available, please contact us for more information.