I bought a Hastings oil filter for my truck a while back at Federated Auto Parts. After I got it home I did my normal inspection and noticed that instead of holes being inside the filter it had hundreds of tiny slits for the oil to come through after filtering. This indeed is a unique design of which I have personally never seen. To those of you that use Hastings filters--do they all have these slits instead of holes? Just curious as to why they use this design instead of doing what everybody else does with the holes in metal design. I hope I made sense.