There's a Drag Harrow thread started, but I thought I put this in another categrory for the simple reason that it is a 3ph Implement that can be raised and lowered via its frame.
Its 2 8x4 field drags with 3 different settings for aggressiveness (forward, backward or upside down - from agressive to passive respectively) ...
these drag mats are hooked loosely on to a a 1/4 steel frame that fits a Cat 1 3ph.
I used it to:
1. Drag the arena
2. Prepare seed beds,
3. Bust up and drag manure pies out in the paddocks
4. Breakup up drive ice ..
5. Since I can position it just off the ground it works like a York rake if I need it to also.
The 2 chain rugs and the frame set me back about 750 new england dollars.
Kubota B7800, and some useful goodies for it.