The Dinnie Stones
Have been training recently to lift the Dinnie Stones (333kg) in Scotland.
Have done a loads of grip work especially on the the bar wrist roller, thick handled dumbells and loads of trap bar work, not to mention David Hornes Dinnie Stone loading pins (superb! and a must)
Here's a video of me successfully lifting the stones unassisted.
Stick with developing your grip strength and your goals will come to you.