K-FILES:Designed to clean out the dentin and make root canals smooth To give operators a smooth tactile sense inside the root canal With diamond-shaped cross section Made of NiTi or Stainless Steel and available of hand use and engine use Recommended rotary speed of engine files: 150~350 r/min Packed with 6 files per box, available of single or assorted sizesH-FILES:The flute depth increases with the taper, creating a sharper, more flexible instrument With round cross section Made of NiTi alloy or Stainless Steel 6 files per box, available of single or assorted sizes