Supplied from very thick 3mm solid SUS-304 stainless steel with an extra thick 3mm heavy duty SUS304 stainless steel chain - This is a stronger version of the standard door chain guard, offering greater resistance in the event of a collision if an intruder attempts to force entry into your property - Provides a useful deterrent and a significant delay if burglars attempt to break into your home, no more sneaking baby adventures. It is treated with fully automatic precision CNC (computer numerical control) machine tools to ensure the stability of the machine. quality and sustainability of the product and has excellent straight line drawing. The appearance of the product is very beautiful and highlights the quality of the product. à fashionable, lead-free. and non-toxic, not easy to break and use in agrave; long term. High quality product. Does not rust, remains stainless steel forever - a durable and high quality product that lasts a lifetime! Chain length 17 cm: The maximum stretch of