Screw picket

A wiring party with shovels and screw pickets.
A soldier using a barbed wire anchor spike to screw in a picket at Fort Belvoir, Virginia (August, 1942)

A screw picket is a metal device which is used to secure objects to the ground. Today, screw pickets are used widely to temporarily "picket" dogs. They are also used to graze animals such as sheep, goats, and horses. Screw pickets are also used to stabilize small trees, tent poles, and other objects that are intended to remain upright.

The original picket was a stake hammered into the ground to secure a horse by tying it to the stake. This required a second tool (a hammer) or the availability of a rock to use instead of a tool. The screw picket is screwed (by turning it) into the ground. In hard ground, it requires a second tool (a leverage bar, or a spare screw picket) or the availability of a length of wood. Screw pickets can be easily bent or broken, but less easily pulled from the ground.