XtremepowerUS Tamper Shank and Plate for Jack Hammer Bit Electric Demolition Concrete Breaker (Tamper Shank and Plate)

1-1/8 shank was .030" oversized. Fortunately, the mild steel machined easily on a bench grinder. Keyway mis-located for "better" hammers (mikita, etc). You almost get what you pay for, you cheap bastard.

After doing a lot of research, I bought an xtremepowerUS jack Hammer. I had originally ordered another chisel that was suggested to buy with the machine, but it did not fit. Again, both this suggested one and again, it is incorrect. Get so frustrated, sent everything back! If Amazon is going to sell these products, they better get it together to know the product....

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!

This is not an XtremepowerUS brand it is a Stark brand available for a lower price elsewhere and shank dimensions are slightly shorter than XtremePowerUS brand chisels.