Surgical, medical and veterinary instruments and apparatus, in particular pedicle screws, modular spacers, stabilizing cords, plates, instruments for measuring the pedicular distance with gauges, square tipped reamers, screw positioning instruments, cord tensioning instruments, hexagonal screwdrivers with retention clamps, mating holding instruments, expanding instruments and positioning instruments for spacers

surgical, medical and veterinary apparatus and instruments, in particular pedicle screws, modular spacers, stabilizing cords, plates, instruments for measuring the pedicular distance with gauges, square tipped reamers, screw positioning instruments, cord tensioning instruments, hexagonal screw-drivers with retention clamps, screw retention instruments, expanders, positioning instruments for spacers