Walking Airplane Groover – 12" x 8" Square End, 3/4" Double Bit (No Bracket)12 x 8 Airplane Groover Double Bit has 3 4 inch bit depth, 7 8 inch bit width, and made of high quality cast aluminum with a broken in face. Airplane groover with big bit no bracket included. 12" x 8" Walking Airplane Groover with 3 4" Double Bit No Bracket Professional grade Walking Airplane Groover built for concrete contractors. This 12" x 8" square end groover includes a 3 4" double bit and is sold without a bracketperfect for those who already