Walking Airplane Groover – 12" x 8" Square End, 1" Double Bit (No Bracket)12 x 8 Airplane Groover Double Bit has 1 inch bit depth, 1 2 inch bit width, and made of high quality cast aluminum with a broken in face. Airplane groover with deep bit No Bracket. 12" x 8" Walking Airplane Groover with 1" Double Bit No Bracket Professional Walking Airplane Groover designed for concrete finishing. This 12" x 8" square end model includes a 1" double bit and is sold without a bracket, making it a reliable option for contractors who