John Deere 40" Tow-Behind Thatcherator - LPTA40JD.
The LPTA-40JD, more commonly known as the Thatcherator, is built with an 11 gauge steel weight tray for adding up to 100 lbs. of additional weight. With 20 oil-tempered spring tines and both dethatch and scarify modes, the Thatcherator is built for the job.

In transport mode, the diamond-tread wheels allow for crossing paved areas without damaging the tines or scratching the pavement. Tines come pre-assembled to the tray to decrease assembly time and are secured via safety wires to prevent damage to mower blades in the event of a breakage.
This is a OEM John Deere part.