7/8" Shaft Couplings (unknown brand)

Description

all pcs are new no box
ID. is .875 on 3 pcs
there is spot rust on the 2 pcs with external teeth
5144866  95 inside 1 pc
B.P.I.  on the outside of the another pc
the pc in the very front is an odd ball
the id is 1.000
my calipers are old and well used