All-Weather Mechanical Keyless Deadbolt Door Lock, Bright Brass All-weather operation - No batteries required - Easy to open door handle design Replaces existing deadbolt on doors up to 1-7/8" thick - (see drilling note* below) Unlocks by push-button code or with standard keys (2 keys included) User programmable code up to 10 digits / 13-digit alphanumeric keypad + CLEAR key Fits both Left-Hand & Right-Hand door types - 2-Position Backset Latch: 2-3/4" & 2-3/8"