This single-cylinder deadbolt can be locked or unlocked by using the keypad or key from the outside as well as the turn button from the inside. The crisp clean appearance of the Satin Nickel finish adds to the overall look of the product and brings a modern feel. Brand Name: Kwikset Sub Brand: SmartCode Finish: Satin Nickel Material: Zinc Product Type: Electronic Deadbolt Packaging Type: Boxed Cylinder Type: Single Cylinder Number of Keys Included: 2 Grade: 3 Grade Commercial or Residential: Residential Warranty: 1 year Limited Parts and Labor Bore Size: 2-1/8 in. Number of Batteries Required: 4 Style: Transitional Keyway: KW1 Number of Keyfobs Included: 2 Projection Measurement: 1 in. Shape: Curved Number of Pieces: 25 pc. Fits Door Thickness: 1-3/8 to 1-3/4 in. Number of User Codes: 20 Re-Key Technology SmartKey Battery Type: AAA Bolt Type: Mechanical Edge Bore Size: 1 in. Projection: 1 in.