FB-42 Split Set Bolt imagwiritsidwa ntchito ngati njira ina yothandizira friction bolt stabilizer ya FB-47 Split Set Bolt pama projekiti apansi panthaka kapena pamwamba pa nthaka m'migodi, ma tunnel kapena malo otsetsereka kapena kulikonse komwe kukufunika thandizo la nthaka, makamaka pakukula ndi kupanga jumbo.Bolt yathu ya FB-42 Split Set Bolt idapangidwa ndi chingwe chachitsulo champhamvu kwambiri chomwe chimakhala ndi Si & P yochepa kwambiri m'zigawo za mankhwala kuti apange ntchito yabwino pothandizira pansi, ndikuthandizira kukhala ndi khalidwe labwino pazitsulo.