Note: This door handle is only suitable for single doors installation, so if you have double door then make sure to order two. Hole Distance: The distance between the centers of the two holes 300mm , 400mm , 440mm , 500mm. Complete Kit: Comes complete with necessary installation tools，includes gaskets and allen wrench. So you can transform your home in no time. Material: High-endurance commercial stainless steel 304 alloy material with strong resistance to , corrosion, stain, and deformation; for indoor and outdoor.