The Master Lock No. BLC0132DKA4 brushed chrome keyed entry ball knob features a bump resistant six pin cylinder and cylindrical construction for enhanced durability with a 2-3/4in fixed backset latch. This ball knob has 3 hr UL listing and meets ANSI/BHMA A156.2, Grade 2 Standards. The 10 Year Limited Lifetime Warranty provides peace of mind from a brand you can trust.