HISTORY LESSON----- IF YOU ARE USING A 1/4 WW SPANER ON A BATTERY TERMINAL BOLT HOW COME ITS A 5/16 BOLT BECAUSE IN THE WAR TO SAVE STEEL ALL WW BOLT HEADS & NUTS WERE DOWN SIZED I HAVE A LATHE WHERE A 1/2 WW BOLT IS FITTED WITH A 1/2 WW SPANNER SO I KNOW ITS PRE WAR HERE ENDS HISTORY LESSON IAN