It had armor on the front of the casemate and on the glacis plate. However, its performance was heavily degraded by sloped armor such as the Panther's glacis. Total armor protection ranges between 550mm-650mm for the glacis and 560mm-700mm for the turret. All of them were reinforced with frontal layer armor welded on the glacis plate. The hull armor was increased to on the front glacis of rolled homogeneous steel. The M48 hull had a wedge-shaped front glacis compared to the M46's rather flat design. The Sherman's glacis plate was originally thick. In these areas, the effect of the glacis plate's slope was greatly reduced. The integrity of the glacis armor was improved by manufacturing it as a single plate. The steep hills around Kerak are characteristic of a glacis. The bow machine gun and driver's hatch switched positions on the glacis plate. ERA was added on front upper glacis. A radio antenna was mounted on the front right of the glacis. By August 1943, Panthers were being built only with a homogeneous steel glacis plate. The outworks are surrounded by a ditch, a covertway and a glacis.