What are these puzzle pieces for?

Problem statement

Here are six items, bought together in a charity shop [US: thrift]. There was no documentation with them. What is the puzzle, and what is its solution?

Four of the pieces are identical of length 3, and two are identical of length 4.

Hint to metapuzzle: show

Restated puzzle: show

Solution to puzzle: show

Comments: show

This is one of several pages on puzzles and metapuzzles .