The Create Originals Freestyle G – Blocks allow you to transform your setup into a Freestyle, no restrictions grinding setup best suited for skating ledges, square rails, irregular objects, light posts, trees, ect.. The Freestyle G – Blocks slide in and fit seamlessly into the beveled edges of the Create Originals Frame Core, enlarging & continuing the grinding plane, ensuring a smooth wear and grinding experience. The Frame Core groove design allows for the ability to still grip on rails while riding with the G – Block setup. The Freestyle G – Blocks also come with a 2 point mounting system that eliminates shifting and turning, creating a rock solid, stiff, reliable & fast sliding Freestyle grinding surface. G – Blocks are sold in sets of 4.