This mount is designed to fit the R22, R44, & R66 Center Spar. The clamp is machined from aluminum to ensure it is strong and light. The design features two socket head bolts to quickly install and remove this mount while making sure that it is a very secure installation for components up to the size of a large iPad. This clamp has been used in hundreds of helicopters and has had great reviews. The original clamp is from 702 Helicopters and they are our supplier. Dont be fooled by imitators.