勾扳(ban)手(shou)又稱月牙形扳(ban)手(shou)，俗稱勾扳(ban)子，用(yong)于擰轉(zhuan)厚度受限(xian)制的扁螺母(mu)(mu)等；于拆裝車輛(liang)，機(ji)械設備上的圓(yuan)螺母(mu)(mu)，卡(ka)(ka)槽(cao)分為(wei)長方形卡(ka)(ka)槽(cao)和圓(yuan)形卡(ka)(ka)槽(cao)。制作工藝：使用(yong)   合(he)金鋼經(jing)高溫(wen)鍛打而(er)成，，.適用(yong)圓(yuan)螺母(mu)(mu)的外徑范(fan)圍:S:22~26S:28~32S:34~36S:38~42S:45~52S:55~62S:68~72S:78~85S:90~95S:100~110S:115~130S:135~145S:150~160S:165~170S:180~200S:200~220S:240~260S:260~280S:280~300S:300~320S:320~350S:360~380S:380~400S:400~420。