Kaba Group 1702-81 door lock

Surface-Mounted Mail Lock

The Kaba Group 1702-81 is a surface-mounted vertical deadbolt lock designed for mailboxes and letter boxes. It uses a disc tumbler cylinder and ships with two keys per lock, each keyed differently. The satin chrome finish suits standard mail-slot installations where a compact locking point is required.

Check Door Thickness And Mounting Holes

Verify that the mailbox door or panel thickness matches the 7/8 inch cylinder length before ordering. Confirm the existing cut-out or drilling pattern aligns with a surface-mounted housing and that the vertical deadbolt throw will engage the striker without obstruction. Ensure the mounting hardware supplied fits the material — wood, metal or composite — of your mailbox.

Disc Tumbler Cylinder And Daily Use

The disc tumbler mechanism resists basic picking and provides a distinct tactile click when the key turns. Two individually cut keys allow separate access for household members or a spare kept off-site. Surface mounting keeps the lock body visible, so lubrication and occasional cleaning of the keyway are straightforward. The vertical deadbolt retracts fully into the housing, reducing snag risk on passing mail or fingers.