K-Files 21mm #20 6/Box. Stainless Steel. For cleaning and shaping of root canals 3.Durable stainless steel construction 4.Ergonomically designed handle for increased tactile feel. Durable stainless steel construction. Ergonomically designed handle for increased tactile feel. Mani K-File is specially engineered from 18/8 high-grade stainless steel for outstanding heat resistance, durability, and flexibility. It has a mirror-like finish and a sharp, flawless edge that follows an ISO standard taper of 0.02. Each file provides a tactile feel with its ergonomically designed handle with horizontal grooves to perfectly fit the fingers and prevent slipping when used for enlarging root canals and extracting debris.The handle is color-coded and marked with the corresponding sizes for easy identification. Available in lengths of 21 mm, 25 mm, and 31 mm in various sizes, with designated rubber stoppers.