- Made from expensive high grade alloy steel.
- Accurately hardened and tempered to withstand higher torque and enable high wear resistance.
| Item Code | Size |
| KTH 7 S | T10, T15 T20, T25, T27, T30, T40 |
| KTH 8 S | T5, T6, T7, T8, T9, T10, T15, T20 |
| KTH 9 S | T10, T15, T20, T25, T27, T30, T40, T45, T50 |
