The PV51 Perma Post Spike is perfect for your landscape lighting fixture to have a strong and durable stance in the ground. This PVC post with cap has sturdy “Ground Grabber” stabilizer with teeth and ribs for maximum stability arms that branch out and can be filled with concrete to give it a strong structure in the ground for a tight hold. It is universal to almost all fixtures due to its 1/2″ threaded hole which fits standard spotlights & lawn lights. Install feature which is easy and simple. It is a screw-in method that just gets tethered onto the bottom of the fixtures.