Convert Limits to Constraints Operator

About

For bones with Joint, Wheel, Slider types it creates Limit Rotations constraints with the name !-XRAY-JOINT-LIMITS, the limits of which coincide with X-Ray limits of bones. No Constraints are created for bones with types None, Rigid, Cloth, Custom. This operator takes into account the Use Limits parameter of the armature.

Mode Parameter

Specifies which bones to remove the constraints from

• Active Bone - At Active Bone
• Selected Bones - At Selected Bones
• All Bones - All Bones has an Armature

Sources

Source