A wedge device for leveling tiles and a clip set for use of the same are disclosed. In one embodiment of the wedge device, the wedge device includes a body having an attachment end, a penetrating edge, a top, and a bottom. The attachment end is coupled to a backstop member and the penetrating edge is configured to penetrate the clip member. The body includes an inclined plane tapering from the attachment end to the penetrating edge. A line-of-sight opening extends along a longitudinal axis of the body to provide visibility through the body from the top to the bottom.