Inline skates equipped with MARSBLADE. Frame: Marsblade Boot: NikeBauer SUPREME one95 Size: 5EE Frame Material: Magnesium and Aluminum Oven-compatible Originally ice hockey skates, the original runners and holders have been removed and replaced with Marsblade. There are scratches as they were used on asphalt. Accessories: Wheel removal wrench. Wheels are not included. Features of MARSBLADE: The lower frame moves up and down with the blue rubber bushings in the center of the frame as the pivot point. The boot sinks forward when leaning forward and sinks backward when leaning backward. This allows all four wheels to maintain contact with the ground during forward skating, backward skating, and turns. Even at high speeds, the edges (grip) won't slip, allowing for stable skating. Comparing inline hockey and Marsblade, it took about 30 minutes to get used to it. There is a sinking sensation. Adjustment is possible by tightening the bushings with the dedicated wrench. The manufacturer claims it feels similar to ice, but it's actually different. Skaters with good technique should get used to it quickly.