High-Speed Steel has many types of drill bits ranging from M1 to T15. Each of these has different grades and values. Some of the more expensive types of HSS are the T grades as they will container more tungsten. If you have all types of HSS mixed together you will generally receive the lowest pricing for all materials due to the sorting time to separate them.
Different HSS Grades:
- M1
- M2
- M4
- M7
- M36
- M43
- T1
- T5
- T15