Best slicer to use for extremely thin vegetable slices?

I make a recipe with very thin-sliced celery and carrots.

Because of health difficulties, I can no longer use my hands to get the slices very thin.

I need to buy a gadget that will do this for me.

Any suggestions? ( Please not the "Salad Shooter", the slices are too large.)

I know there are "mandolin food slicers" and other attachments to various brands of food processors that claim to slice vegetables.

1. Will either of the above give me a very thin slice?

2, Which brand have you or a friend used.. and recommend for thin slices?