The Clarke CISAD 3/4 to 1/2" impact socket adapter is suitable for use with either hand ratchet or air impact wrenches. Manufactured from chrome molybdenum steel and chemically blackened for protection from corrosion.Includes a retaining ring which can be used to lock the socket into the square drive.- Manufactured from chrome molybdenum steel- Chemically blackened for protection from corrosion- Suitable for hand ratchet or air impact wrenches- 3/4" to 1/2" Square Drive- Impact qualityPTDCLA1800365"