Yenziwe ngezinto ezikumgangatho ophezulu, le seti yezixhobo zokuguqula i-lathe ziqhayisa ngokunxiba okugqwesileyo kunye nokuxhathisa ukubola. Zivavanywe ngokungqongqo, ezi zixhobo zigcina ukusebenza kakuhle kokusika naphantsi kokusetyenziswa kakhulu, zandisa ubomi bazo.