Confidence Builder: This skater aid gives your child the courage to try the skates out without you having to break you back supporting his / her. It allows children to leave the wall without the help of their parents while supporting and stabilizing their bodies, helping them to learn roller skating better. ◆ Metal Roller Skate Trainer: Load-Bearing - 75kg / 165lbs. This roller skating trainer is made of thickened steel pipe, strong and durable. 4 feet design more stable, not easy to fall over. ( 1.2mm Thick Steel Pipe. ) ◆ Trustworthy Skate Mate: The flexible 360° rotatable wheels run smoothly and steadily while moving forward in sync with the wheels of your roller skates. Users can keep their body balance by grabbing the handrails. ◆ Easy To Assemble: The spring snap has been designed to line up with the hole, once positioned, it is easy to install smoothly and it takes about five minutes to assemble the parts together. ◆ Available In Two Sizes: Small Size ( Suitable For Age: 3 - 7 Years Old. Suitable for People Height: 105cm - 120cm / 41.3inch - 47.2inch ). Large Size ( Suitable For Age: 8 Years Old - 14 Years Old. Suitable for People Height: 120cm - 145cm / 47.2inch - 57inch ). Gently used has a few scratches