SPIKE PRACTICE: Practice spiking without spiking your credit card statement! COMPLETELY ADJUSTABLE: Perfect for younger kids or elite adults. Simply raise or lower the product to the desired height and get your reps in. ONE OF A KIND: The Thunder Striker is the best way to practice spikes, comprable models cost 3-4x more. EASILY MANEUVERABLE: Don't let the 46 pound product scare you off, wheels are included to make transportation a breeze. 12 MONTH WARRANTY: 12 Month no questions asked warranty. As a small business out of Charlotte, NC, we stand by our products. Talk to live help over the phone or E-mail if you have any issues. Perfect for at home use or for team practice. The best way to get your reps in and practice proper spike techniques on a budget.