Features: Digital Locks: For people who always forget their keys, combination locks can solve this problem very conveniently. Keyless Cabinet Door Lock: This combination lock is an ideal choice for toolboxes, cabinets, drawers, mailboxes, school lockers, or any place where a key is not appropriate. Scope of Application: This combination lock is suitable for cabinets with thickness between 0.5 to 12mm and the mounting hole can be 19 x 15.8mm. Material: This combination lock is made of high quality zinc alloy material to ensure it is strong, precise, secure, and durable for long term use. Easy to Use: This combination lock is very easy to install without screws; the lock can be set with 1-15 digits combination. Specifications: Lock Rod Thickness: 18(mm) Specifications: 20mm length 6-digit combination lock, 30mm length 6-digit combination lock Type: Digital Battery Type: CR2023 (not shipped with batteries) Includes: 1 * Set of Lock