Included Components Drill 1,counterbore 1, tap 1, install driver 1, M8x1.25×11.7mm inserts 10. Kit include Drill 1,counterbore 1, tap 1,install driver 1,M8x1.25×11.7mm inserts 10. High speed steel (HSS) provides good wear-resistance and can be used in general purpose applications for both ferrous and non-ferrous materials.