These smart rigging screws are probably the best available. The solid 316 grade stainless body has bronze inserts to prevent the cold welding problems associated with stainless threads seizing in stainless bodies. Furthermore they are fitted with specially designed taper locking nuts so that split pins are not needed. The ease of making rigging adjustments using these screws means that rigs tend to be better tuned. If you would like your shrouds roll swaged into the rigging screws please phone us on 020 7703 9786 extension 29 to discuss your exact requirements.