The Rankee Universal Adapter will take any of your existing drywall handle and be able use just like TapeTech Interchangeable XHT/FHTT handle and Columbia’s ONE handle. No need to buy a costly new Interchangeable handle just to use your new Corner Applicator Head. The Universal Adapter features a D-Shaped fitting that securely positions the handle in the Angle Box and prevents the tool from rotating during use.