ʻO nā mea hoʻokiʻekiʻe kiʻekiʻe kiʻekiʻe DD waena me ka poʻohiwi huinahā kūpono no ka lawelawe ʻana i ka pahu paipu, puʻu kola, paipu drill, pahu a me nā paipu. Aia ka ukana mai ka 150 tons 350 tons. ʻO ka nui o ka nui mai ka 2 3 / 8 a hiki i ka 5 1 / 2 in. Ua hoʻolālā a hanaʻia nā huahana e like me nā koi ma API Spec 8C Specification for Drilling and Production Hoisting Equipment.