勾形扳手:又稱月牙形扳手，俗稱勾扳子，用于擰轉(zhuǎn)厚度受限制的扁螺母等；專用于拆裝車輛,機(jī)械設(shè)備上的圓螺母,卡槽分為長(zhǎng)方形卡槽和圓形卡槽.
　　制作工藝：使用優(yōu)質(zhì)合金鋼經(jīng)高溫鍛打而成,強(qiáng)度高,耐磨.
　　適用圓螺母的外徑范圍:S:22~26     S:28~32    S:34~36  S:38~ 42    S:45~52     S:55~62 S:68~72     S:78~85     S:90~95  S:100~110   S:115~130   S:135~145  S:150~160    S:165~170  S:180~200  S:200~220     S:240~260   S:260~280   S:280~300     S:300~320    S:320~350
 S:360~380     S:380~400    S:400~420