ON SOME SILLS THERE ADJUSTMENT SCREWS TO IMPROVE SEAL.KEEPING COLD AIR OUT OF YOUR HOUSE.THIS DOOR WAS INSTALLED IN 1993 ORIGINAL DOOR TO WHEN BUILDING WAS BUILT.improvement
ON SOME SILLS THERE ADJUSTMENT SCREWS TO IMPROVE SEAL.KEEPING COLD AIR OUT OF YOUR HOUSE.THIS DOOR WAS INSTALLED IN 1993 ORIGINAL DOOR TO WHEN BUILDING WAS BUILT.improvement