Letter Box 3 Digits Digital Lock

Lock 3 digits Letter Box Lock suitable for Singapore HDB Letter Box.

 

The power of 1 to 3 number

A 15-dial lock using only digits 1, 2, and 3 (repetition allowed) yields exactly 14,348,907 possible People buy 15-dial locks with 1-3 digits (14,348,907 combos) as secure upgrades for home/mailboxes, valuing high security without complex digits.

 

DirectOnline SG 3-digit but scalable concept; consumers pick for 14,348,907 combos

 

Why They Sell

 

3-digit digital locks sell strongly for HDB letter boxes due to their ultra-compact size fitting standard Singapore HDB mailbox cutouts without drilling or alterations.