Gimme one good reason

I dare ya to come up with one, just one good reason to have two part numbers here.
Part Number Cat.
Group Part Description GM Min.
Buy Qty Dealer Trade List Core
23247262
10.485 RING-KEY RET (16MM DIA) *FINE WIRE 4 0.10 0.13 0.18 0.00
23232599
2.187 RING,KEY RET *ULTRA FINE W 4 0.10 0.13 0.18 0.00
Part Number Cat.
Group Part Description GM Min.
Buy Qty Dealer Trade List Core
23247262
10.485 RING-KEY RET (16MM DIA) *FINE WIRE 4 0.10 0.13 0.18 0.00
23232599
2.187 RING,KEY RET *ULTRA FINE W 4 0.10 0.13 0.18 0.00