The Johnson Hardware 111FD Series 36 in. Track and Hardware Set for 2-Panel Bi-fold Doors features surface-mounted pivots and hangers, so there's no special hole drilling required. It accommodates 18 in. panels weighing up to 50 lb. each. Shock-absorbing hinges self-locate and automatically align the doors. The hangers feature a quick disconnect clip system facilitating easy mounting or dismounting of door panels.
