A na-eme mma "Passion" tungsten carbide slitting mma maka ụlọ ọrụ lithium site na akwa akwa tungsten carbide ntụ ntụ na cobalt ntụ ntụ na usoro ntụ ntụ. Tụnyere na omenala nchara agụba, Passion si TCT agụba nwere ọtụtụ elu hardness (HRA 89 ka 93) na-eyi eguzogide (3500 ka 4000 Mpa) .N'ime gara aga 10 afọ, anyị mma na-ere ọtụtụ ebe na China, Europe , Japan na USA wdg Ngwaahịa anyị dị elu na ọnụ ahịa ụlọ ọrụ emeriwo nnukwu ahịa ụlọ na mba ọzọ maka ndị nkesa anyị.