well to be honest guys that website everyone recommends is shiiiit ( s p o t i n j e c t i o n s . coM! went to my doctor today and he said who ever gives information on injecting there doesn't know what they are talking about, Delt injections only need quarter or max half an inch needle and should be jabbed in the outer side of ur upper arm. i blacked out because i listen to this bollox from the site!