get the one that fits your socket set 1/2 is best for general use but if you go to 3/4 and get a set of reducer sockets i.e 3/4 to 1/2 and 1/2 to 3/8 and also 3/8 to 1/4 youll have a tool to do everything-- although the smaller sizenuts and bolts you should really get a small torque wrench for -- thats what i do any way - but you havent got to listen to me i know nothin
