McGrath Ultra-Secua Digital Lock, Suits Common Screen Doors, IP66 rating, Black Finish And Supplied With Lock BodyThe Ultra Secua by McGrath Locks is a digital lock designed specifically for screen door applications. A great addition to the home, office or business, this 4 in 1 digital lock provides a versatile and convenient method of entry that allows you to easily manage who has access to your property. The Ultra Secua can retrofit most screen door locks on the market including triple locking screen doors. It has been designed with a unique security feature on