Check the listing for details. Mechanical Keyless Entry Door Lock Digital Code Keypad Knob Combination Deadbolt. Color: Silver, Condition: New. Listed at 39.72 USD. Description: This Is an Energy-saving Password Lock That Does Not Need Any Power Supply at All. It Is Suitable for Indoor and Outdoor Doors. the 2-4-Bit Password Is Very Safe and Easy to Install. It Is a Suitable Choice. If You Use the Initial Password, Please Keep the Initial Password Card（Each Lock Has a Different Password）. If You Forget the Password, You Will Not Be Able to Open It from the Outside and Need a Professional to Unlock It. Specification: Color: Silver Panel Size: 107*42*25mm Panel Material: Aluminum Alloy Lock Material: Steel + Zinc Applicable Door Thickness: 30-60 mm （The thickness of the door in the installation position is 3-6cm and the width of the door frame is 8.5cm or more. If the original door has a lock on it, you need to have seen the picture of the door.