I'm buying 3/8 Mac torque wrench that is rated for 5-100ft, it does nm,ft/lb,in-lb,kg/cm and degree. Is it possibly to do degree that will probably exceed the 100ft??, let's say your torquing the headbolts and asks for 90degress and 90 degrees again, wouldn't that exceed over 100ft and would that damage the torque wrench? Or should I just go ahead and buy the 1/2 torque wrench?