I've been looking at Ko-Ken stuff lately.
According to the 2011 catalog,
They offer their Nut Grip® in 1/4":
2450MS (7, 8, 10, 12, 13, 14) 6pt shallow
2350M (8, 10, 12, 14) 6pt deep
2441M (7, 8, 10, 12, 13, 14) 6pt universal (wobble)
3/8": 3425(2B) (E10, E12, E14, E20) female torx
3450M (8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 24) 6pt shallow
3350M (8, 10, 12, 13 14) 6pt deep
3350M(L12) (12, 12) 6pt extra deep
3441M (8, 10, 12, 13, 14) 6pt universal (wobble)
3341G.70-89 (10, 11, 12) glow plug universal
1/2": 4450M (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 24, 27) 6pt shallow
4325(L140)-2B (E8, E10, E12, E14) extra deep female torx
124M.600(2B) (8, 10, 12, 13, 14, 17) 6pt shallow with ball joint t-handle
113-50(2B) (7, 8 10, 13, 3/8) 6pt nut setter (1/4" hex?)
167C(2B)socket driver for screwdriver handle (1/4" hex?)
Wow, that's a lot.