The PS1 ABS Spike is perfect for your landscape lighting fixture to have a strong and durable stance in the ground. It is universal to almost all fixtures due to its install feature which is easy and simple. It is a screw-in method which just gets tethered onto the bottom of the fixtures. This Spike has a 3/4" Female Thread so it is compatible with all 3/4" Male Fixtures. It is a replacement ABS Light Fixture Ground Spike that matches all of our products if you ever needed any extra for your fixtures.