ARKSEN© 1500W Electric Demolition Jack Hammer Concrete Breaker Punch Construction (Red)

Noticed that this model incorporated a 1500W motor instead of the 1200W (approx) in similar versions of this tool by other manufacturer(s), therefore, that was the deciding factor for the purchase.Unit is very substantial, in at least 50Lbs.Needed to get through 24" of rock (lava) for fence posts, and this hammer had the power to do it.This jack hammer comes with two bits: one is a chisel and the other is a point. The point kept getting itself stuck in the rock, so I switched to the chisel bit. It would get stuck far less, but in that case, it could be worked free, where the point would really tough to get of the stone.The handle on the front is great for control so you can chip horizontally / reduced angle. Has a button w/ trigger so that the hammer will keep running without having to hold the trigger, which tires your hand as your day of jack hammering progresses.Unit comes loaded with oil (reservoir), and the instructions recommend Shell Rotella 40w oil for adding as you go.Inside the bit housing / other areas self lubricate with the oil as the unit is running, so the level must be watched (with the upright and vertical, a see through housing that has a large hex head that can be removed with the included tool).I thought that the oil level at described in the manual was a little on the parsimonious side, so I kept the oil at half way (though looking glass housing). This worked fine. Every few hours check the oil level, adding as needed. After about three hours of operation, I would take a break, to rest myself, but also, to allow the hammer motor to cool off, as it gets very warm after such use.I also removed concrete of existing fence posts, which this hammer made short work of. Concrete is much easier to get through than solid rock!Operation is extremely loud, so make sure to get a good pair of headphones. Don't cheap out on them headphone quality because the hammer action is very, very loud, and you'll be out there for the day / 2 / 3.Also, you'll need a good pair of construction glasses (or goggles), gloves, and a heavy duty extension cord (12 or 10 gauge). Lighter duty extension cords can damage the motor(s) of heavy load equipment over prolonged use.Excellent buy, has a lot of power, I wanted to get the review in here because one had not been done, and this unit is a deserved thumbs up.Tool arrived in only a few days.Suggestion: after ordering the tool, get a quart of Shell Rotella 40w oil, fresh gloves, good headphones (not just ear plugs), and the extension cord, in preparation, so you are ready when the tool arrives. Once tool arrives, check / add oil to half way through looking glass. Locking the bit in the housing is not illustrated that well in the manual, but there are a couple of good reviews of the similar [Sky Jack Hammer] on You Tube, where this procedure is shown in detail.Good luck on your project!

Ignore the other reviews, this thing is complete garbage.**Executive Summary**1. Motor gets extremely hot at the brushes, throws sparks, then quits.2. Case seal at bit starts leaking within 15 seconds of use, draining all oil from crankcase.3. All case seals leak, covering tool in oil and puddling in the storage case.4. Crankcase oil supply mechanism does not work, guaranteeing that tool will grind itself to powder very quickly.5. Hammering piston (made of steel) chews up housing (made of cast aluminum) very quickly.And that's only a partial list. Keep reading for more detail.It's hard to know where to start with this jackhammer, but I should preface this review by saying that I am a long-time customer of cheap, Chinese tools. I know that they often have problems that require some re-engineering at home before they become useful. I also know that they are seldom as good as their name brand equivalents and they often have idiosyncrasies you must learn to live with. I also know that they never last as long as a quality tool. You don't buy these for your heavy use, daily tools that must work flawlessly every time. All that to say, I'm not expecting a Bosch here.Of course, if you understand the caveats and are willing to put up with a little frustration, the cheap Chinese tools can be a real boon. They are especially helpful for weekend warrior types who need, say, an obscure and expensive diagnostic tool to figure out why their car is running so poorly, but don't want to spend a fortune on a one-time use tool. In that case, cheap Chinese is perfect.There are many times, however, where the cheap tools are utterly useless. The engineering flaws too great; the poor construction quality insurmountable. They simply cannot be used and that's where this jackhammer comes in, unfortunately.I need to do some trenching around my property. This involves breaking up packed dirt and the occasional granite rock. I'm not asking much of this jackhammer and am generally about as gentle on tools as one can be. Nevertheless, the first Arksen jackhammer overheated and quit within the first 15 minutes of use. The second (warranty replacement) quit within 5. The electric motor overheats at the brushes, the brushes start throwing plumes of white sparks around the motor casing and then the whole mess stops working. When the motor cools down, it starts working again. Each time the motor overheats, it pits the commutator and on one occasion, blew a big chunk out of one of the brushes. Thank goodness I have a warranty replacement tool to scavenge for parts!Having done some basic diagnostics, the only thing I can figure out is that the motor is undersized, the armature poorly wound, or some other essentially fatal engineering flaw. On that basis alone, this jackhammer is irredeemable, requiring expensive motor work to make it useable.But wait. There's more...Several engineering flaws combine in a synergistic way to ensure that this jackhammer will completely destroy itself in relatively short order. This all involves oiling and friction.The electric motor turns a crankshaft that drives a piston in the nose of the tool. The piston hits the bit, thus causing the hammering. Obviously, this all requires careful and exact oiling. Too much oil and the piston will drive [more] oil out the seams of the case. Too little oil and the piston grinds itself into oblivion.First, the tool ships with the crankcase bone dry. If you're fool enough to buy it, take the tool apart before using it the first time and poor about a 1/2 cup of oil into the crankcase.Second, the oil supply is a separate tank with a length of rope extending into the crankcase. You fill the tank, then hope (I guess) that it siphons itself along the rope into the crankcase in sufficient quantities to prevent serious damage. Frankly, I can't think of any scenario, in any alternate reality, where this would ever work. Essentially, there is no oil supply to the crankcase.Three, and much worse, the crankcase seal fails on the first trigger pull, allowing all the oil to drain out. That seal, the bottom-most and most important, seal around the bit is a simple o-ring. The instructions, written in Chingrish, say nothing about proper insertion of bits, but you should take some time to grease them beforehand. Dry install will likely damage the oring. Of course, we're talking about the business end of the tool here, so even with careful installation, the oring will be completely destroyed within about 15 seconds of operation. After 15 seconds, you'll find a thick gray ooze pouring down around your bit. That's all the oil in your crankcase, along with fine particles of what used to be your jackhammer before the friction inside the case scraped it all away.Four, the piston is steel. The piston housing is cast aluminum. Good engineering practice requires that the piston slide in a steel sleeve pressed into the housing. When this practice is ignored, it guarantees that the piston will grind away the housing until failure.In the end, you have a time-bomb tool. There is no way it can ever work in a way that doesn't end in catastrophic failure within a short time. Do not buy it!Even leaving all that aside, this tool is just a pain.-The smell of toxic rubber coming from the clamp on handle is enough to bring a grown man to his knees. Do yourself a favor and throw it away immediately and wear gloves when handling it. If you keep it, it will fall apart within a year and you'll discard it anyway.-The clamp on handle slides around the housing so easily that it's useless. Nor can it be tightened in any meaningful way. Just remove it and save yourself the frustration of thinking it's there.-The instructions are written in Chingrish. You may be able to figure out what the gobbledegook means, but I couldn't and I'm an English major.-The other handle, the flimsy plastic trigger handle, broke within 5 minutes of use. Again, thank heaven I have a warranty replacement jackhammer to use for parts!-If you don't place the jackhammer carefully before pulling the trigger, the bit will come out of position and the thing won't hammer. This makes any sideways work nearly impossible.-The thing leaks oil everywhere. It comes out the nose, around the bit, out the side seams of the case and even into the electric motor. If you do any real work with it, you'll have oil all over your hands, gloves, pant-legs, shoes and your work surface. Yuck factor is off the scales.In the final analysis, this thing is complete, utter and irredeemable crap. It's only value is recycle value and that will be a lot less than you paid for it, unless you get about 13 warranty replacements. Stop considering it. Don't think about it. Don't look at it. And for God's sake, don't buy it!You'll be sorry.

Thank goodness for amazon prime return policy. The top handle with switch is made out of plastic, which can break easily unlike the green colored neiko jack hammer which is made out of metal. I have the green one and will stick with that one.

This demo hammer has turned out to be just what I needed. It's been very reliable, not too heavy, and durable as it's fallen over on concrete a couple of times with not apparent damage, but having said that, I haven't worked it too hard YET….

This item works well thus far ....I have never used a commercial jack hammer so cannot compare ....I am using this in my yard to dig in rocky soil and with the shovel attachment it works really well . Quality is good and a great price ! The storage box it came with is really flimsy and I would think they should think about changing this to something else in the future .

Very impressive demo hammer. This hammer does the work of my bigger jack hammer at half the weight. It can get hot with consistent use but has not failed yet after successive days of operation. Very good value, equivalent brand name tool is $800-$1000.

My husband said this worked great! He had to break up some concrete washout from the cement truck, and this did the job easily. Only thing is, it doesn't come with 40W oil, but very good for the price.

Broke my neighbors and bought this to replace it. Good price, but may have a wiring problem if you let it over heat.