See: RC-Project.it

RC-Project have introduced the new Ergal ballstuds for the SWORKz S35-4. Machined in Italy from high-quality Ergal 7075-T6, the ballstuds are hard coated for wear with a thickness of 50µ and also Teflon coated to reduce the coefficient of friction. Available as pair, the ballstuds weigh only 2.0g.