The Summer Chatham Post Safety Gate for Baby can be used between doorways and stairways. The 30” tall baby gate fits openings up 28.5” to 42” wide.Easily install this baby gate on stairways with the included kit, or by using the no drill doorway mount for in-between doorways. Tools are required for hardware mounting. Also included are two extension frames: one 4” and one 7.5”.