Marvin pole saw heads have set the standard for pole pruning since 1943. The U-2 is known as a universal saw head, because is accepts a wide variety of pole saw blades. Pole saw blades are easily attached with a wing nut and can be adjusted to several different cutting angles with the aid of the fixed locator pin. The U-2 saw head is made from rust resistant, lightweight cast aluminum. A built in hook helps pull hanging limbs. This U-2 saw assembly comes with a quick change adapter so you can snap into any 1-1/4" female pole ferrule. Saw blades sold separately.