By Heather Burlingame, Senior Production Editor | September 28, 2010

Designed for work in trenches, retaining walls and on pads, the 185-pound Mikasa MT-84F has an impact force of 3,950 pounds. Driven by a 3.5-hp Robin engine, the unit is fuel efficient, quiet, and has lower emissions than 2-cycle rammers, according to the company. It delivers 698 blows per minute, an improvement over the company's predecessor models. The rammer travels at 36 feet per minute and can compact a maximum area of 2,000 square feet per hour.  Mikasa MT-84F