VEXpro-Single-Reduction-Clamping-Gearbox-VEXpro-217-4156-P-This-single-reduction-clamping-gearbox-from-VEXpro-achieves-versatility-through-its-simplicity-The-gearbox-uses-four-bolts-to-clamp-onto-a-piece-of-1-x-2in-Versa Frame-tube-so-no-precision-machining-is-needed-Once-mounted-it-mounts-a-CIM-style-motor-offset-from-a-bearing-block-on-a-perfect-84-tooth-gear-spacing-P-You-can-use-this-efficient-set-up-to-drive-an-upper-mechanism-with-ease-or-combine-multiple-gearboxes-to-create-a-sm