20 11/32AF,SOCKET 1/4" 11/32"
20 12,SOCKET 1/4" 12 MM
20 13,SOCKET 1/4" 13 MM
20 14,SOCKET 1/4" 14 MM
20 3/16AF,SOCKET 1/4" 3/16"
20 3/8AF,SOCKET 1/4" 3/8"
20 4,SOCKET 1/4" 4 MM
20 4,5,SOCKET 1/4" 4.5 MM
