Dilemma Games
I.Q. 309
I.Q. 310
I.Q. 311
I.Q. 311A
Escape-21 playthings
8.5x10.5x2.5
10.5x12.5x2.5

Please see the solution as the youtube link below;

 

https://www.youtube.com/watch?v=yw3-74rm6rs