You could, but you wouldn't! They're really nice for bigger flies, they allow you to use small widegap hooks with large flies. Long shank hookd provide more leverage for the fish to pop your hook out. Basically you get an adapter for your vice which allows you to mount tubes on them and tie your flies on the tubes as if they were the shank of your hook. Once your fly is done, you run your line through the tube and tie ot off on a hook. They're really pretty simple to use and tie. The hardest part is forking over the 25$ for an adapter and tubes. If you check out http://www.pugetsoundflyco.com (site sponsor!) and go to their online store, hit up the Product Categories: dropdown menu and "select Fly Tying--Tube Vises" - they have pictures and descriptions of both the starter kit and the expert kit (IMO the starter kit works great). If you decide to get into tying tubes I can pretty much guarantee there are 4 or 5 guys on this board who will be able to help you with any problems you have.