This was the lightest jackhammer I could find for long-term use. I used it with a separately purchased clay shovel to begin trenching terraces into a rocky hillside for a terraced garden. The jackhammer outlasted me daily, and it performed perfectly. I did watch youtube maintenance videos in addition to reading the instructions before adding 10w40 oil for first use. My first test was on a tight access hole for a fencepost, and 4 bursts cleared it out like the clay compacted rocks were butter. Since then I have been able to trench 4 90 foot terrace outlines and begin leveling within the terrace to minimize the soil erosion that had left only rocky scrabble on the hillside. The hammer is light enough for me to carefully move and operate without assistance. Only one large rock slowed it for a burst or two over several days use, so it would do concrete very well if that had been my need. Planting trees and shrubs on the terrace will be minutes per hole instead of pick and shovel hours. Adding a fence reinforcement would be hours instead of weeks. A rented trencher had failed due to large rocks and the angle of the hillside making operation hazardous. The picture shows the most level part of the slope.
jan white 
