My own version of the the wrapping paper cutting tool to work with slightly larger and more widely available blades, and a tapered region under the blade to aid cutting.
Simply push the blade in to the slot with a pair of long nose pliers.

Swann-Morton Blade Size 26 - BPSCA 113 - TL12869
Blades available on amazon from here https://www.amazon.co.uk/gp/product/B01E9SAI1O/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=B01E9SAI1O&linkCode=as2&tag=theaveragecyc-21&linkId=a619275995c92d9a0992d30650298068 or from here: https://ebay.us/UFk0to

Filament available here https://www.amazon.co.uk/gp/product/B01E9SAI1O/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=B01E9SAI1O&linkCode=as2&tag=theaveragecyc-21&linkId=a619275995c92d9a0992d30650298068

Creality

Ender 3

Doesn't Matter

No

40%