The Hauck Close N Stop stair gate comes with a 9cm extension. This means that it can be used for door frames and landings with widths of 84 - 89 cm.Assembly is quick and easy. The metal gate is clamped between walls or in door frames with fixing screws. No drilling required.*Close N Stop has a double manual locking mechanism. It can be opened with just one hand and engages reliably into the childproof lock.Close N Stop can also be combined with our separately available Y-spindles to attach it to landings with round bars (optional).You have a larger opening width? Then we recommend the Close N Stop stair gate that comes with a 21cm extension. This can secure a width of 96 - 101 cm.* Assembly instructions: This product is a self-adjusting gate. This means that the gate's initial misaligning/gap on the level of the locking mechanism is eliminated by tightening the locking screws in the frame. Features: Easy to fix Locking mechanism for double safety Opens to both sides Childproof Lock Inc