米制(六角孔尺寸) 英制(六角孔尺寸)
規格說明 :R6、R7、R8、R9、R10、R11、R12、R13、R14(米制)
R3/16、R1/4、R9/32、R5/16、R3/8、R7/16、R1/2(英制)
