Pneumatic Hammers and Air Cannons are used for bridge breaking of powder and some granular materials in Bulk Storage Silos/Bins/Hoppers and the destruction of rat holing in silos. The “PG” Series Gunjet Air Cannon utilises a shot of air to dislodge built up material generally in a rectangular bulk storage bin/hopper. The “PS” Martshock Bin Hammer delivers a very powerful strike to the Silo or Bin wall, the energy released by this action has a direct influence on the material in storage and has the destructive effect to break the bridging or rat holing internally.