Clarke professional tool set, housed in a really useful storage case, contains a multitude of incredibly useful ¼\", 3/8\" and  ½\" drive †Torx-Star® \'T\' bits, square drive \'E\' sockets, Spline bits and tamper proof bits all precision made from high chrome vanadium steel. The full set also carry\'s a lifetime guarantee* to inspire real confidence in this fantastic, hard wearing product. †Torx star bits for Torx®Fasteners - \'Torx\' is the registered trademark of Camco/Textron Lifetime guarantee* covers defects in manufacture or materials during the lifetime of the tool. See product packaging for full details