Specification: ID:18mm, OD:20.5mm, Overtall:70mm, Depth:40mm; Works with multiple hex Socket:19mm(3/4")&21mm(13/16"). Performance: The socket with durable teeth and shape is more safer while you are installing the lug nuts and all of our products past 72 hours salt spray tested which can promise a longer service life compared to 48 hours for others.