These comfortable T-Handle HEX bits make it easy to apply more torque and are much preferred by professionals and regular users. They come in a neat storage rack with sizes marked for easy selection. 4 x 100mm long keys – 2, 2.5, 3, 4mm. 2 x 150mm long keys – 5 & 6mm. 2 x 200mm long keys – 8 & 10mm.