Choyamba, mankhwalawa akuwonetsa kulimba kwambiri: Poyerekeza ndi mano achikhalidwe a ndowa, mano awa alimbikitsidwa kwambiri, zomwe zimapangitsa kuti asasweke mosavuta akagundidwa.
Kachiwiri, imakhala ndi mphamvu yolimba yotha kutha: Mano a zidebe zachitsulo zopangidwa ndi alloy amapangidwa ndi chitsulo chopanda mpweya woipa, zomwe zimapangitsa kuti zikhale zolimba kwambiri, zomwe zimakhala zolemera kuwirikiza kanayi mpaka kasanu kuposa mano a zidebe zachitsulo zopangidwa ndi manganese.
