My girlfriend recently purchased a punch bag and bracket for me, but i haven"t yet hung it on the wall as im not sure what kind of fixing bolt would be adequate. I"m told i need to fix the bracket to an external wall. I have picked my spot where i want the bag to hang. I have also been informed that i could use fischer bolts to fix the bracket to the wall. If anyone can confirm this or come up with alternative idea it would be much appreciated.