Features and Benefits:�Heavy-duty: Withstands constant use�Versatile: Increases DYMO-RIG bit capacity from 10" to 14"This spacer mounts between the cradle and the diamond drill motor to increase the bit capacity from 10 in. to 14 in. For use with models (4115, 4120, 4115-21, 4115-22, 4120-211, 4120-22).