The US Pro BER3430 scaffolders impact socket is designed for use with cordless impact wrenches and other compatible 1/2" square drive tools. Manufactured from heavy-duty chrome molybdenum (Cr-Mo) steel with a durable phosphate finish, this 21mm impact socket measures 52mm in length and is ideal for scaffolding assembly, dismantling and general fastening applications. Supplied with a retaining pin and O-ring for secure socket attachment, it provides reliable performance in demanding construction and site environments.