This set of K Flexi Files by F2 Medical Supplies is perfect for dental use. The files come in length ranging from 21mm to 31mm and are made of high-quality stainless steel, ensuring durability and reliability. With six files per box, this set is a great value for any dental practice. The files are CE certified and manufactured in China, making them a great addition to any dental practice. Whether you're a dentist or orthodontist, these K Flexi Files will be a great addition to your practice.