EASY TWIST LOCK: The height of the baseball tee is easily adjustable from 21"- 33". Once the twist lock is tightened, the metal post will not slide off. We surveyed baseball tees on the market and replaced complicated and fragile clips with easy twist locks. ONE PIECE DESIGN: The batting tee comes in a one-piece design, eliminating the complexity of putting it together and making it easy to carry around without disassembling it, so you can take it with you in our included organizer bag. STRONG STABILITY: We use a tripod design for more stability, you can also place the sandbags we provide on the bottom for the most stability. DURABLE RUBBER TOP: The replaceable tee tops are made of durable and flexible rubber so you feel the ball, not the tee, when you hit the ball. NOTE: Do not hit the non-rubber portion of the tee. EASY INSTALLATION: No tools are needed to open and close the tee, just like an umbrella, with your child's bare hands! /