Made to order screws. Production delay presently 2-5 weeks. Size / thread : centre hole m10. Material : top grade 5 titanium. Quantity : 10x rings per order. We single point cut all our screws. 10+ years of experience. 100+ quality ordering available. This item is made of hardware and titanium knife parts, machined titanium, aerospace titanium, nasa titanium, aircraft titanium, anodized, top grade titanium, titanium hardware, grade 4 ti, titanium, grade 5 ti, cnc.