mini excavators.
We have a variety of mini's where I work at an equipment rental company.
Starting with a 301.5 (all Cat), 303, 305, 307 and so on up to normal sizes.
We rented a 303 the other day, I changed from bucket to hydro hammer in minutes for the customer to jackhammer down 5 feet for a gravesite that was all ledge a foot below surface.:Banghead
You can carry the bucket off a 301 and 303 around in one hand, if you're stout enough.They also have diverter valves to change from Cat to JD pattern. These machines are constantly rented; homeowners and contractors love 'em. You figure, every bucketfull on that 301.5 is equivalent to a dozen or more with the old P&H (pine handle)...and with a hammer it beats holding a 90 lb. compressor driven one all day long. For somewhere around $150.00/day on up, these little irons serve a good purpose!