This 45 degree cutter has a funnel run in which makes it much easier to insert your filament...

I made the filament hole 3mm, so if you have a damaged or whispy end on your filament it will still fit...

it would defeat the object if you had to trim it with nippers before it would fit in the cutter

it is really a substitute, easy to hang up tool for people that keep mislaying their nippers...

this one also uses those blades with a profile so they wont fall out.you can buy 100 of them for 8 quid on ali express...