. . "It shouldnt do this,I tighten mine on torq setting not speed setting,slower more torq will set it better.If yoyu a faster speed on the drill (no not the # 15) most will have a switch that is A or B or 1 and 2 this is setting for fast screwing and slower but more torq of course you must also have the driver set on the highest # possible.If still not working have someone with a great grip give it a" . .