This item is a new outdoor sports product for boys and girls, the capibility is 60kgs,it is popular for the following characteristics:1.Flashing wheel makes your movement as a small whirlwind pulley. 2.Adjust the size by open the screw move to another hole, then tighten the screw. 3.Just clamp the skate to your shoes and buckle the belt. 4.If you do not want to skate, you can walk by shoes with the skater on your shoes. 5.Its safe,simple,easy to learn and portable.