Skid mount
A Skid mount is a popular method of distributing and storing machinery and usually-stationary equipment for the military and industry on its own or with other units as part of a modular system. The machinery at point of manufacture is permanently mounted in a frame or onto rails or a metal Pallet. The equipment can then be easily secured and transported and used as a unit. A unit such as a fire-fighting Skid unit may also be temporarily placed onto a vehicle to equip it for a task. They often have standard sized holes (called "pockets