Hi there Rlee. Just go to any Stihl dealer and buy a new 0 to 135 degree hedge trimmer head. Remove the string trimmer head of one of your machines and put the hedge trimmer on and when you don't need it put the string head back on. Try not to buy USED stuff if you can help it as these are your money making machines.You are just buying some one elses head aches as to WHY are they selling it? Buy new and you will enjoy it more !