ALGONAC, Mich. -- A long-distance swimmer finished a 22 mile trek across a Michigan lake while pulling a ton of bricks.

It was all for charity, to raise awareness and funds for Habitat for Humanity.

Jim Dreyer completed the journey Wednesday morning.

Video shows him pulling two inflatable boats filled with bricks.

He started out Monday morning in Lake St. Clair, near the Michigan-Canada border.

Dreyer swam the trip alone, without the use of a support boat.

But he was wearing a GPS tracker.

It took him more than 50 hours over two days to finish the swim.