- Dipped Internal Hexagon Socket
| Number | C inch | S mm | L mm | Be-Cu g | A1-Cu g | 
| 6308-3 6308-4 6308-5 6308-6 6308-7 6308-8 6308-9 6308-10 | 1/4 | 3 4 5 6 7 8 9 10 | 55 55 55 55 55 65 65 65 | 17 17 20 26 30 45 55 65 | 16 16 18 23 27 40 50 60 |