These lightweight aluminum driveshafts are made from 3.00" O.D. x .125 wall aluminum tubing, custom made to Coleman's specifications, the end yokes are CNC machined from billet aluminum. Each shaft is balanced and includes 1310 series u-joints. This driveshaft offers an 8-lb weight savings over standard steel driveshafts and are rebuildable. WARNING:These driveshafts are not for street use or drag racing.