1/2'' impact socket does not fit 1/2'' impact driver

前兩天在這裏跟風也買了1/2 Chicago Impact wrench, 

也買了

Craftsman Evolv  1/2-Inch Drive, 5-pc. Impact Socket Set, Inch

However the socket does not fit into anvil of the impact wrench.

They both are size 1/2 , what I miss here.

多謝了！

所有跟帖： 

• 握拳攥緊socket，四邊對準，用力壓。沒別的竅門 -滿地找牙- ♂ (155 bytes) () 11/29/2012 postreply 19:51:24

• 緊 -BigV8- ♂ (0 bytes) () 11/29/2012 postreply 21:15:46

• 那個四方頭 上，有一個彈簧鋼圈？用來固定socket 不掉下來， -史迷- ♂ (292 bytes) () 11/30/2012 postreply 07:45:53

• 回複：那個四方頭 上，有一個彈簧鋼圈？用來固定socket 不掉下來， -甲子- ♀ (29 bytes) () 11/30/2012 postreply 11:47:32