Master Lock, DSNRN0603PBOX, Bright Brass Single Cylinder Deadbolt with Kwikset Keyway & NightWatch, Grade 2 Polished Brass Single Cylinder Deadbolt with Kwikset Keyway & NightWatch, Grade 2 The Master Lock No. DSNRN0603PBOX features a single BumpStop resistant cylinder deadbolt with interior thumb turn. The six-way adjustable latch fits all doors with 2-3/8in or 2-3/4in backset, square, rounded corners, or drive-in. The concealed screws offer an enhanced appearance and easier installation. This deadbolt is ANSI GRADE 2 performance, designed for heavy-duty residential application or medium duty commercial application. The polished brass finish provides a sleek appearance. The Limited Lifetime Warranty provides peace of mind from a brand you can trust. Product Features: Keyed Different Single cylinder deadbolt (thumb turn inside) - Includes Nightwatch unauthorized key lockout system BumpStop technology - bumpstop resistant cylinder Six-way adjustable latch fits all doors: 2-3/8in (60mm) or 2-3/4in (70mm) backset, square, rounded corners, or drive-in Concealed screws for enhanced appearance and easier installation Anti-pry collar resists prying attacks Full 1in (25mm) solid core throw bolt for strength ANSI GRADE 2 performance for heavy-duty residential application or medium duty commercial application For exterior locking applications, Entry door