The halyard slider has been specifically planned for wire halyards and for those halyards which are subject to such high strain as to preclude use of a stopper. This solution permits easy adjustment and secure locking of halyards. The complete system includes: hard black aluminium T-track automatic version, with fixed length and with numbered positions of the slider, positioning holes spacing 50 mm, fixing screws spacing 100 mm. The halyard slider with the 2 positions stop-pin: locked and automatic insertion. 2 simple aluminium end fittings for T-track.