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.