Looking for a filter cutter

[defektes]

I use a large pair of channel locks to hold the filter while I use a hacksaw to cut the seam, takes like 4 minutes.

 

[901Memphis]

I have the cheap knock off rotary tool from Harbor Freight, its Drill Master but not sure if the motor can cut a filter, also is it safe to be using a cutting wheel on a used oil filter?

 

[Jakegday]

completely. ive done it dozens of times. a fuel filter on the other hand....