High-Performance Door Closer - TB600. Experience superior door operation with the TB600, designed for those who demand more from their door closers. This model outperforms its predecessors, ensuring reliable and efficient performance in various applications. More Powerful Closing Force: The TB600 offers enhanced strength compared to TB200 and TB400 models, providing greater closing power for heavy or high-resistance doors. Complete Installation Hardware: Perfect for a wide range of doors including residential, commercial, and high-traffic entrances, ensuring dependable performance ...