Siegen T-Handle Ball End Hex Key Set. 8PC SET – Sizes: 2, 2.5, 3, 4, 5, 6, 8, 10mm. SUPPLIED IN STORAGE RACK – Convenient storage/carry rack for easy organisation and portability. BALL-END HEX SHAFTS – Each handle incorporates a long ball-end hex and short hex shaft covering lengths 125-195mm to suit a variety of applications.