A snap lock system for connecting adjoining countertops comprises: a first locking unit comprising a first surface and an opposite second surface, the second surface being attachable to a first countertop, wherein the second surface has a profile comprising a projection, a first recess, and a second recess; a second locking unit comprising a first surface and an opposite second surface, the second surface being attachable to a second countertop, wherein the first surface has a profile comprising a projection and a recess; the second surface comprises a recess; and a third locking unit comprising a resilient member and a chamfered longitudinal edge, accommodated in a locking groove defined by the second recess of the first locking unit and the recess of the second locking unit. The profile of the second surface of the first locking unit is configured to receive the profile of the first surface of the second locking unit to provide a connection preventing mutual horizontal movement between the first and second locking units. During connection of the first locking unit and the second locking unit, the third locking unit is configured to allow vertical mating of the first locking unit and the second locking unit and, after connection, the third locking unit is configured to prevent mutual vertical movement between the first locking unit and the second locking unit.