Ready, set, BUILD the track of your dreams with Hot Wheels® Track Builder Unlimited. The Track Builder Unlimited Speed Clamp Pack is a part of the STUNT category and helps kids build vertical elevation into any stunt as an impressive starter stunt with the drop gate, or in the middle of the track for more momentum and a bigger challenge! The sliding clamp mechanism is super easy to attach to a table, chair, or shelf and its adjustable connection points let kids build their track anywhere. The Speed Clamp Pack is one of 7 different packs that let kids BUILD, STUNT, and BOOST. The STUNT category gives kids an innovative stunt piece they can add to their Track Builder Unlimited world. Connects to other Hot Wheels® sets (sold separately) for infinite possibilities. Add to other packs in the BUILD and BOOST categories for even more fun or add this stunt to Multi-Lane Speed Box or Triple Loop Kit (sold separately). Great gift idea for ages 6 to 10 years old.