I use this Torx socket set as a supplement to my great "Ratchet box" by Proxxon. This I have already more than 10 years. I screw as a hobby to my car and have to say that price / performance with Proxxon just right. Everything fits, is robust and I am sure also this box is to me for many decades loyal service. Very nice also the packaging for storage. The sturdy metal case comes with me not to use, but also the plastic insert is good to keep the papers in my tool cart.