Ballpoint on end of long arm and standard hex on short arm of l-keys. ball head slides easily into socket and can drive or loosen from an angle of 25% off-axis. model blx12 includes: 0.050", 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", & 5/16".includes: (12) ball end hex keys. number of pieces: 12. size: .050 thru 5/16".