This is a NEW starter drive that fits a lot of the older tractors, including Farmall A,B,C,H, M, Super A, Super H, Super C, Super M, MTA, W4,W6, 100, 140, 200, 240, 300, 340, 350, 400, 450, All with gas & propane engines. Also John Deere M, 320, 330, 40, 420, 430, 440 tractors. And Also Allis Chalmers D12, D14, WC, WD, WD45, G. It is a 10 tooth, counter clockwise rotation, spring cushioned drive. It is MADE IN THE USA. I also have a similar drive for Clockwise applications for some Cub & Cub Loboy, Case, Oliver, & Massy Harris tractors. If you have questions please ask.