A reversible vibratory plate compactor provides variable forward and reverse operation, which is ideal for compacting trenches and backfilling around foundations. In addition, these machines can be used stationary for “spot” compaction Plate compactors exert force on the ground using a large plate, usually made from steel, that vibrates rapidly. The force compacts the soil and the vibration encourages the grains to move closer together, eliminating air pockets and providing tighter compaction .There are three types of compactor equipment: rammers, plates and rollers. Each tool covers a different amount of surface area and applies varying force. In general, rammers and plates are smaller and exert less pressure