Depending on the model of Tudor you've purchased you may need to get two tools. If your SS bracelet has removable lugs, you'll want to get yourself a pair of needle nose tweezers to help you toggle both pins at once to secure the lug to the case and bracelet to the lug.
I own a 79260 Tudor Prince Date - a real treat to own and I swap between leather, stainless, and perlon bracelets.
https://www.amazon.com/Bergeon-6767-...pring+bar+tool
https://www.amazon.com/Needle-Stainl...zers+for+watch
PS. Don't let a dealer do any of this work, they are essentially taking money from you. When doing cosmetic work the main requirements are patience and a steady hand. Bring it in when it stops working...