The U shape of this Stairgate frame provides a solid pressure fit & no holes to drill. Easy to adjust. Ergonomic & easy one hand opening. Wide walkthrough & sprung system so gate always stays shut. Adjusts to fit openings between 75cm & 81 cm. (can be extended up to 137cm with a separate extension kit) Suitable from birth to 24 months Extensions available separately. Conforms to BS EN 1930:2011