Kwikset Signature Handlesets are the ultimate in strength and style. The Signature Series features ANSI Grade 1 Security Deadbolts with 1 inch Titanium Alloy Throwbolt Core plus Ultra-Strike Jamb Brace. Manufacture Lifetime Lifetime Mechanical and Finish Warranty. Kwikset Signature Series Handlesets are available in single cylinder front door locks, dummy handlesets for double doors, and double cylinder locks for high security.