* A starter [[compass]] may be be used in the creation.
*90 blacksmithing skill, 14ql protractor gives 29% chance
*66 blacksmithing skill, 14ql protractor gives 16% chance; 43ql protractor 50% chance
*42 blacksmithing skill, 42ql protractor gives 25% chance
*31.9 blacksmithing skill, 18ql protractor gives 6% chance