These wheels are 6" x 1⁄4" wide and come in our four most popular grit sizes. Excellent for finishing work after using the Galaxy carving wheels. Nova Carvers can be used on the Genie or Titan and most other grinding machines that have standard arbors. Nova Carvers have a 1" arbor hole. Hub width is 1⁄8". Extra spacers may be needed when mounting these wheels. Genie owners can obtain maximum convenience by mounting the Nova Carvers on a separate right hand adaptor. This eliminates the need to take the regular Nova Wheels off the adaptor each time you wish to use the Nova Carvers. Nova Carvers will fit directly onto the Titan shaft.