Isakhiwo sinobukhulu obahlukeneyo, kunye nezinga eliqhelekileyo: 21 * 41/41 * 41, 41 * 62, 41 * 82, njl. Umatshini ofanayo unokuvelisa ubukhulu obuhlukeneyo, unokwamkela i-designable adjustable ngokupheleleyo okanye uyilo lwekhasethi okanye ulungelelanise i-roller nge-shims.
Iiprofayili zesakhiwo zisetyenziswa ngokubanzi, zingasetyenziswanga kuphela kwinkxaso yelanga, kodwa nakwinkxaso yokuchasana ne-seismic, kunye namandla ayo aphezulu kunye nokufakwa okulula, kuye kwacetyiswa ngokubanzi kwaye kusetyenziswa kushishino lokwakha.