These are two quilling tools for rolling paper. There are two sizes. One is for standard paper, the other one is for thick cardstock paper up to 0.50mm thick.

Print with 0.40mm nozzle, 0.20mm layer height, and add a small brim if you are worried about bed adhesion. Print orientation is already correct in STL.

If you want the handle longer or want a longer slot for holding paper, just scale the STL on the Z axis up.

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I like to modify my printer parts, trying to make them better. Take a look at some of my other projects and designs:

MK3S Y-Axis Motor Mount Ultra
(improved Y-Axis motor mount with better shaft and nuts)

MK3S Z-Axis Tops Improved
(Less vibration and easier Z-Screw Alignment)

D.R.O.P.P.E.R. - PINDA Adjustment & Positioning Tool
(Achieve the perfect SUPERPINDA position)

MMU2S Single Filament Guide Festo M5 Coupler
(Retain your original MK3S spool mounting while still using MMU2S in single color mode)

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If you're absurdly rich and want to support a poor guy like me in my 3D printing and photography endeavors, check out my Patreon:
https://www.patreon.com/photogad