Your search ends here, at the top resource for specialty fittings. One of the many unique and rare fittings available exclusively at Canopies and Tarps, our 1" T shape thru for specialty fitting roof structures is made from sturdy, galvanized steel to ensure that your most valuable possessions - and you - will stay protected. The eyebolts add an extra level of stability, allowing you to fasten tent poles snugly, making your structure impervious to inclement weather.