For years I have been trimming low-hanging limbs and branches from my trees the hard way - with chain saws, hand saws and large sheers. Even with long handles on the sheers, they were just too short, so I would use other means to get up higher, which was still ineffective and downright dangerous. So now I have finally wised up and purchased this tool that is DESIGNED to do it! It works GREAT, and easily gets way up into the trees - even higher than I need to go. It is very easy to unpack and assemble. Re the saw blade - it simply mounts on the end of the pole with the "hook" on the end of it. With the wing nut and bolt you choose one of 3 holes to position it at the angle you want. A second screw is on the mounting bracket that extends beyond the surface - of which you insert into the second hole on the blade to keep it secured in place and unable to swivel after tightening down the wing nut - see photo. Easy peezy, lemon squeezy! The saw blade cuts through the limbs easily. One note of caution however - it is wicked sharp, and quite frankly dangerous if you are not wearing a pair of leather gloves. Even being careful (but stupidly not wearing gloves), one of the razor sharp teeth stabbed my hand when removing it from its plastic bag. Subsequently, I highly recommend keeping the blade covered with a scabbard - which I ordered a few days ago. I must have looked at every single pole saw available. This one offered the best bang for the buck as far as I can tell, as they can quickly get very pricy. For me, having 3 separate poles is the way to go. That way, you don't have to always be carrying the full weight of all the poles when you don't need that much reach. Just use one, two, or all three of them. If you need even more reach, you can buy additional poles. They are very sturdy. My only regret with this product.... is that it took me all these years to finally wise up and buy one!Update - I received my scabbard and it works GREAT. After reviewing probably every scabbard available on the market, I chose the Weaver Leather Arborist 27 Pole Saw Scabbard. See photos I added. I am very happy with it, and wrote a review on it as well. Go to that product if you are interested in reading it. As stated above - I DEFINETLY recommend getting a good scabbard for the saw blade, and by all means... be sure to be wearing leather gloves when handling it! Don't make the stupid mistake I did when putting it together!