I have a pair of these that came with some other parts. I am wondering what they fit and if anyone needs them. A value might help as well.
Wasn't there an automobile called the Detroit?
There was a Detroit Automobile Company (DAC), founded August 5, 1899 and dissolved in January 1901. It didn't last long. The general manager was Henry Ford. It later became Cadillac under Henry Leland.
At least so says Wikipedia.
Brand of wheel lug for demountable, perhaps mfg name of the wheel too. These type lugs were used by many different auto mfg. on their wood wheels.
#4 in this listing of lugs is the Detroit.
These are 1915 era, cars that used the Detroit brand are, but not limited to:
The lugs and other hardware came in several variations.
Shear numbers would suggest your wheels are Chevrolet.