6 simple machines

Wheel and Axel: device consisting of a grooved wheel turned by a chain with a rigidly attached axle

Wedge: A trianglar shaped tool used to separate 2 objects or hold an object in place.

Lever: consists of a rigid rod pivoted at a fixed hinge or fulcram.

Screw: Consists of an inclined plane wrapped around a rod.

Pulley: consists of a grooved wheel with a rope looped around it.

Inclined plane: consists of a sloping surface on which an object can move.