The original design is not the "two arrows" layout you see in these photos although the solving principle is the same.
The "two arrows" version here is from Tom Lensch. The puzzle is made of Walnut for the frame while the pieces are Maple, Bubinga, Indian Rosewood and Yellowheart. Very well constructed with a nice fit and finish. The SBSB is also not to be confused with Goh Pit Khiam's Arrow Blocks puzzle which tho' the latter has a similar external appearance to the SBSB, the solution and method of solving is totally different (and a lot more difficult).
The SBSB is a sliding block puzzle. Object is to slide the 5 pieces around to form a "complete arrow" on the left side, after removal of the Yellowheart start piece (which happens to be the only piece that can be removed from the frame).
But the SBSB has a "trick" to it....the pieces have been constructed in such a way that certain movements are restricted (hence "slide blocked"); making it much harder than it looks. A normal 5 piece sliding block puzzle would have been a pretty easy solve. But here, the SBSB requires a minimum of 41 moves to complete.
The SBSB is a different take on the traditional sliding block puzzle. And with the arrows design, it also displays very well. Available from Tom Lensch for US$125. [Edit 12 Jan 2015 - Someone has written to me to say that Tom does not have any more available]