U+ file (Protaper Gold) , 25 mm, NiTi, 6 pieces, in various sizes

A guide to using machine needles, what you need and what you need them for.

The U+File from Superline is identical in every respect to the Protaper Gold needles.

How does it differ from the U-Profile (=Protaper Universal)?

/The needle material Maxtech 3.0 NiTiThis new material is produced by exposing the alloy to a certain amount of heat over a certain period of time, which changes its physical properties.

• More flexible
• Softer (lower cutting performance, but fewer fractures)
• Increased service life of the needle
• Recommended for channels with less than 15° curvature
• Needle colour: gold

If you want to work in ducts with a curvature of less than 15°, the manufacturer recommends the U-blue, X-blue and X-grey needles instead of the U+.