Replacement Steering Pinion Gear for John Deere GX20053, fits Many 100 Series Lawn Tractors Specs - Outside Diameter: 1 3/8", Height: 1", Metal Hardness (HRC): 30. Refer to images 2 & 3 for more information Includes - (3) Gear; comes as shown in the first image Some helpful tools you may need to replace your gear: 3/4" socket (1/2" drive prefferred) with breaker bar, gear puller, PB Blast or WD-40, Jackstand, small metal file, and large hammer. These tools are NOT included