Threshold self supporting ramps are simple, lightweight, solutions for smoothing uneven door thresholds, whether the door swings inward or outward. These ramps are ideal for use on door thresholds where you do not want the ramp to extend onto the threshold plate, including sliding glass doors, doors with storm doors, or raised landings. The ramp aligns directly against the door threshold, keeping the ramp from interfering with, for example, a storm door that swings inward or outward. Mfg's Model No. SSTH