AR-15 Kronenmutternschlüssel / Castle Nut Wrench

Quick and easy made castle nut wrench to tighten a loose 35mm castle nut.
Of course, it doesn't tighten the nut as securely as the right tool would, but it works as a temporary fix if you don't have anything else on hand
Torque depends on your material, I tightened the castle nut until the PLA+ tool broke.