Flexor is a displacement tool designed to offer a versatile control for bending rods or beams. Usually bending effects are accomplished with a chain of bones, but the Flexor plugin allows much smoother, faster, and easier control. The amount of bend is controlled by an exterior object (most often a Null object).

Flexor is designed to work especially well in conjunction with the Whip plugin, to produce many dynamic "springy" effects.