I use these on my Rural King (Yanmar)25 hp tractor bucket for long, heavy logs(after weight has slid to bucket & turned up), hauling brush, digging out roots of old stumps, which is abusive-I know-I've seen the lower lip of bucket start to bend, so I'll add a wrap-around chain in the slots provided for stump digging next time.
The forks extend 33 inches beyond bucket lip. For me, anything longer would put the bucket uncomfortable high for unloading, and would add more torque when I'm digging and lifting
Within an hour of receipt, I picked up a couple of 8 ft concrete pillars filled with cement and rebar that were in the woods (a house burnt down in 1959). I slid under and jiggled them up to chest high and drove away. Also carried some 18-in live oak logs about 12 ft long to the house for cutting into firewood.Always slide weight close to bucket.
I recommend:
1) bright paint on the tips for driver visibility from tractor, and 2) slide a 2x3 into the hollow vertical part when handling brush or large items high up to prevent possible fallback onto tractor
3) For heavy duty work attempts, hook chains in the slots and wrap around bucket to share the stress between the bottom lip and the rest of the bucket.
4) Instead of a heavy hammer on clamps, make a 2foot bent pipe for torquing them down.
5) The stabilizing bar is minimal, needs a 3rd (& heavier duty) wing nut, and requires a tool to get tight enough. At least the wing nuts are out of the way of working material:)
Thanks to Vevor for this cost effective solution to many tractor tasks.
Joseph Hinchman 
