It utilizes Magnet-Lock Technology to automatically draw the door closed and guarantee it locks each and every time. It also has a Hold feature for those times where the door needs to stay open until it is pushed closed. Optional extensions are available for wider openings to 47 €. nNo damage to walls or doorways. Magnet-Lock Technology automatically closes gate. Installs quickly; no tools needed. Mounting options pressure mount. Optional extensions Model G4100 are available for openings up to 47.5 €. Note KidCo does not recommend pressure mount gates for top of stairs use, even with hardware mounted wall cups. There is a bar at the bottom of all pressure mount gates that helps keep the gate in place and this bar can be a tripping hazard when placed at the top of stairs. nSize of Opening and Extensions Needed 31.5 37 included with gate. 37 42.5 1-G4100. 42.5 47.5 2-G4100. Features n Heavy duty steel constructionn Gate Width 29 € €“ 37 €n Gate Height 30.5 €n Bar Spacing 2.375n Hold feature-keeps door open until it is pushed closedn Optional extension is available for openings up to 47.5 €n Installs quickly; no tools neededItem Details n Dimensions 29 37 x 29.5n Color White