Protex SDB-106 Under-The-Counter Deposit Safe The perfect way to lock and secure suggestions, ballots, mail, money, rent checks and more. Drop Opening: 5-3/4 (W) x 7/16 (H) Saw-toothed baffle to protect slot. Safe comes with two keys per lock. Tubular-style key lock with double "D" configuration. Indoor use only! The perfect way to lock and secure suggestions, ballots, mail, money, rent checks and more.^Drop Opening: 5-3/4" (W) x 7/16" (H)^Saw-toothed baffle to protect slot.^Safe comes with two keys per lock. Tubular-style key lock with double "D" configuration.^Indoor use only!