3/4″ Galvanised straining screws jaw / jaw.
Double protection from failing during use with cotter pins to prevent the vibrations during use undoing the bolts. Additionally lock nuts are used to prevent the turnbuckle undoing during use.
WARNING: Using a turnbuckle without these two safety features would be DANGEROUS!
This item meets an EN1176-4:2017 compliant installation when installed following the safety guidelines.