Traxxas 8061 TRX 4 Rear Heavy Duty Machined Axle Shafts w Input Gear (2) High Voltage This is the Walthers Cornerstone This is the Ravensburger This is the Walthers Cornerstone HO Scale Wayne Bros Ford Dealership This set includes: (2) Kato 186mm 7 5 16" Concrete Tie Double Straight Track (2) Kato 124mm 4 7 8" Concrete Tie Double Straight Track (1) Kato 62mm 2 7 16" Concrete Tie Double Straight Track (6) Kato 248mm 9 3 4" Concrete Tie Double Straight Viaduct Track (1) Kato 186mm 7 5 16" Concrete Tie Double Straight Viaduct Track (2) Kato 124mm 4 7 8" Concrete Tie Double Straight Viaduct Track (1) Kato Double Track Truss Bridge (Black) (4) Kato 381mm 414mm Radius 45 Degree (15" 16 3 8") Concrete Tie Double Track Viaduct Super Elevated Curve (2) Kato Concrete Tie Double Track Viaduct Super Elevated Easement Curve Left (2) Kato Concrete Tie Double Track Viaduct Super Elevated Easement Curve Right (2) Kato 186mm 7 5 16" Concrete Tie Double Track Incline Track Straight (2) Kato Double Track Incline Pier A1 (2) Kato Double Track Incline Pier A2 (2) Kato Double Track Incline Pier A3 (2) Kato Double Track Incline Pier A4 (3) Kato Double Track Pier (2) Kato Double Track Concrete Pier No Includes the left and right side These heavy duty axle shafts are used in the rear axle only and are machined with the input gear on the shaft