NITI Endo Engine-Use K-Files, Reamers Materials: Nitinol Length: 21,25,28mm ISO size: #15,20,25,30,35,40 Packing: 6pcs/box, available in Individual and Assorted sizes Use: For endodontic canal dental treatment Features: * Super Flexibility, Suitable for Various Complicated Canal * High Resistance to Wear and Excellent Cutting Efficiency * With Advanced Process and Reasonable Quality-Price Ratio Increased Flexibility : *Ni Ti shaft is made of premium nickel-titanium with 5 times the flexibility compared to stainless steel files Strength: *Ni Ti has 10 times the stress resistance compared to stainless steel files Convenience: *Produces smooth and progressive enlargement of root canal ? *Ni Ti follows existing canal path and has memory so there is no need to pre-bend the files Efficiency ? *Color coded handles and pre-inserted silicone stops Safety ? *Ni Ti resists spontaneous breakage ? *Increased angular rotation reduces fracture ? *Ni Ti decreases zipping and stripping