10 x longer life span in comparison to normal hss drill bits extreme temperature resistance higher cutting speed lower wear and tear harder than tungsten carbide and titanium lower cutting forces din 7483 cobaltforstner drill bit set 5 piece din 7483 10 x longer life span in comparison to normal drill bits higher cutting speed no burning of materials improvedwork results application in particular for extremely hard woods as well aspressed plastics contents 15 20 25 30