The LTFS-12 thumb bolt is a tool less pin connector to connect LingTong fast system frame with an aluminum profile. Thumb bolt can help combine LingTong fast system with square system. The bolt length is 28mm. The Fast system can be used for multiple applications: stand building, displays, trade shows, propaganda, poster, decoration, backwall in exhibition and events.Fast system combines the modular aspect with a custom-build look. LingTong fast system guarantees a fast build-up and assembling. Moreover, it is the strongest, lightweight and only tool less system in the market. LingTong Fast system is not only fast and easy to use, it also has a long-life-cycle and is endlessly reusable by constantly re-using the same frames.