Bonefix 100 fixator, essential and easy to use, is suitable for the treatment of Colles fractures and more in general for ulna and radius fractures. Application is eased by the spherical joints on each end of the fixator structure; Traction is graduated with continuity thanks to a micrometric screw. Once a firm positioning and reduction are obtained, implant clamping is guaranted by a sliding nut which fixes in synthesis the different fixator’s elements.