M.K.
My hubby was adamant about not using or drilling into any part of the staircase/railing. We found the Kidco product at Babies R Us (the white metal gate and components) and purchased extra extensions. Then we were able to arrange the gating slightly behind the stairs and could snake it around and extend it until it reaches the closest two walls. This way, the gate is actually a few inches behind the top of the stairs and securely attached into the studs of nearby walls. The only downside is that it costs more money to buy the extra extensions. I think we spent $90. But I still love having that gate up, keeping the kids away from the stairs and the overlook.