Heavy duty stem strippers are needed when a large quantity of flowers are needed to be cleaned in a short amount of time.
All flowers should be processed correctly - and that means all leaves and debris should be removed that will be below the water line in your water buckets. Leaves and other debris can cause bacteria growth, which can lead to early wilting of flowers.
These hard case strippers can sell for up to $20 or more in gardening stores or craft shops. I sell them cheaper so that DIY brides can actually afford to use them for cleaning thorns off her wedding flowers!