The Master Lock BLC Series Ball Knob provides exceptional security and durability for diverse applications, including residential entryways, storage rooms, interior doors, and classrooms. Built with robust cylindrical construction and enhanced by advanced BumpStop® technology, it delivers superior protection against unauthorized access. Its brushed chrome finish ensures a sleek, corrosion-resistant surface, making it a durable and stylish choice for both residential and commercial settings. Backed by a 10-Year Limited Warranty and meeting ANSI/BHMA A156.2, Grade 2 standards with a 3-hour UL fire rating, the BLC Series offers unmatched reliability and peace of mind.