Sunex 220umd 1/2-Inch Drive 20-mm Deep Universal Impact Socket 'Tools'] The metal cutting head is

The metal cutting head is corrosion and rust resistant and is sealed for protection from water

combination internal/external with thumb screw

97702 SWITCH

Generous shoulder relief allows unrestricted arm movement

Sunex 220umd 1/2-Inch Drive 20-mm Deep Universal Impact Socket 'Tools'] The metal cutting head isForged from the finest chrome molybdenum alloy steel the best choice for strength and durability Radius corner design to extend the life of fasteners The design drives the side of the fastener instead of the corner Provides increased strength, but also avoids rounding of rusted or damaged fasteners 1 2 Inch drive, 20mm deep universal impact socket