Hello with angle grinder trying to remove disc please help (Eugene)

Description

Does anyone have an Allen wrench for the new dewalt angle grinder that can remove a 4.5 mm disc from it so i can return to the home depot? It's missing can't find it anywhere, as soon as possible as return subdue ends in few days. It's a long black allen wrench for a dewalt dwe402w 4-1/2 (115) paddle switch small angle grinder with wheel Please let me know as soon as possible! Thank you and his much to remove in very handicap and can't figure it out. Our find the long black Allen wrench to remove disc...