Rollers ndị a dabara adaba maka gwongworo mkpọfu crawler MST1500. Ha na-arụ ọrụ dị mkpa na chassis ma na-ejikọta ya na ọrụ ije nke chassis.
Ha dị elu ma na-adịgide adịgide, nke a na-eme nke ọma, ṅaa ntị na nkọwa, ma nwee ike iguzogide ule siri ike nke iji dị arọ na gburugburu ebe ọrụ siri ike, nke nwere ike imeziwanye arụmọrụ na ndụ ọrụ nke akụrụngwa.
Yijiang na-enye rollers dị iche iche na egwu rọba maka crawler undercarriage nke Morooka juputara gwongworo, nọmba nlereanya MST300 MST600 MST800 MST1500 MST2200, na na.