Easy to carry: Aluminum-Magnesium makes these pads strong, yet lightweight. They never waterlog and become heavy like wood pads do. Additional Safety: Almag pads help ground line trucks, wood & poly pads can isolate the truck. Stable: Sauber engineered design prevents slipping and sinking, and will not crack or splinter. If you ever break a Utility Outrigger Pad, they’ll replace it free of charge, including shipping.