XtremepowerUS Jack Hammer Tamper Shank & Compactor Plate, 1-1/8" Hex Shank with 6" x 6" Tamping Plate, Heavy Duty Demolition Hammer Attachment for Soil, Dirt, Gravel & Ground Compaction

Works just fine with my jackhammer. Be aware, though, that once you've compacted anything with the base in place, you'll never get it off, so using the shaft for compacting gravel into narrow spaces between posts and the edge of post holes isn't really an option. It can easily be inserted and removed from the tool. The coating isn't very durable and rusted quickly, but that doesn't matter much for our purposes. It's solid. A plate compactor is much more efficient and *much* less effort than using the jackhammer with the tamper/compactor. However, even renting a plate compactor for a single project (let alone buying one) can easily cost much more than buying this bit and having it when you want it, forever.

Got to say that I was very uncertain given the lack of strong reviews for this product prior to buying it. Suffice it to say that it is not cheap either. Now that that's out of the way, this thing is high quality, heavy, and works with my 2200 W jackhammer to a t. I used it to tamp the base Rock and soil behind a retaining wall that I am building and it delivered with a vengeance. I barely had to do any of the work alone other than picking the jackhammer up and moving it. Once there the weight of the shank, tamper, and jackhammer was more than sufficient to tamp the dirt. If I had one wish it would be larger, of course. But then my weak body probably wouldn't be able to lift it anymore. Go ahead and get it. It's what you think it is, it works just as it looks like it will. One tip is that once you put the shank in the tamper you are not getting that bad boy off. Well, maybe you have if you have access to high power hydraulics or something, Pat Superman's grip alone would not be sufficient, point being get it aligned right the first time. Once you thump, it's permanent.

Everyone who complained that it didn't fit their jackhammer must have overlooked that it was made for the ExtremepowerUS electric hammer. I had bought that jackhammer here on Amazon and this tamper foot fit perfectly. My only complaint, more of a want really, is that it had a bigger foot. In the grand scheme of packing dirt, it takes forever to pack the pit left behind after replacing a rusted out yard hydrant. It may not be the best, but I'm still keeping it.

This compactor attachment works well on my Jackhammer. Perfect size and weight for compacting base rock in a trench (building a block retaining wall). Saved me from renting a Jumping Jack on the project.

Didn't fit the harbor freight electric jackhammer because of where the retention flat on the side of the hex shank is in relation to the hex shape

Used to compact crushed limestone backfill for fence post holes. I'm sure it'll work to compact any loose material. Kind of expensive for such a simple cast tool. Hard to get apart once used together, compacting in the hole is achieved without the square base, but once you attach the base (taper fit) almost impossible to get apart again.

These bits are not in any way interchangeable. 1. They are shaped differently. 2. The XtremepowerUS Tamper Shank hexagonal part is much thicker than the bit that fits the Bosch jackhammer. It is so thick that it will not even fit into the Bosch at all. 3. Even if the XtremepowerUS Tamper Shank could fit into the Bosch, it would not be able to lock into place due to the differences in location of the groove. I do want to state that the XtremepowerUS Tamper Shank feels like it is very high quality. I'm sure it is very tough. However, I am irritated that it was not specified that this bit would not fit Bosch jackhammers. If 1&1/8 inch jackhammer bits were standardized, this problem would have never happened. Buyer beware!

Works very well. Great for deep compaction before pouring concrete to repair 10 square foot hole in a slab on grade.

De buena calidad y práctico

Equipo muy robusto, excelente calidad, cumple con lo ofrecido