The Little Soleil line of adjustable chairs is designed with your child's growing needs in mind. Adjustable: Seat Height, Seat Depth, and backrest can be adjusted independently with ease by twisting polypropylene lock knobs. You can simply twist open the knob, slide the seat and backrest along anchoring rods and lock them into desired positions. Caster Wheels: It features a five-caster base with locking casters and a comfortable seat/ backrest. Anti-Swivel: For added safety for smaller children, an anti-swivel lock is provided and can be installed at your discretion. It matches perfectly with the Little Soleil Children's Height Adjustable study desk (sold separately). Let the Little Soleil Adjustable Desk/Chair be one of your child's best companions.