A SHOWA VLH-G24-US26 Grade 1 ANST lever lock set is an advanced type of locking mechanism that meets the highest security standards established by the American National Standards Institute (ANSI). This type of lock set is designed to provide superior strength and durability, making it suitable for commercial or high-security residential applications. ANSI Grade 1 locks are generally constructed with heavy-duty materials such as solid brass, steel, or a combination of both. The internal components such as the latch, deadbolt, and cylinder are reinforced to resist physical attacks, including drilling or picking. These locks are commonly used in commercial buildings, institutions, and other high-security locations where durability, reliability, and resistance to tampering are 6 crucial. However, they can also be installed in residential settings where superior security is desired.