The adapter from ½" square to ¼" hex 56H557 by GRAPHITE is made from durable CrV steel. It has a length of 50mm and allows you to change the attachment from ½" square to ¼" hex. The adapter is designed for impact spanners and screwdrivers. It features a practical hole for easy mounting. It allows fast attachment of HEX-type bits and drills. The knurled, non-slip surface of the ring ensures that bits can be changed quickly and easily. The GRAPHITE adapter is recommended for professionals and DIY enthusiasts.