Knucklestrutz beginners set. Really cool, interconnectable building toy that I found at a yard sale. This is generation 1, there have been changes made to the tools design since this set but they're really cool and you can build a lot of stuff.
I found a bag of these building toys loose at an antique mall and found out they were called "Ramagon" so I bought two boxes of this full construction set as well as a few more loose sets as well. These are a really cool, and unusual, construction set from the 1970s.
These are my construction toys that are complete in box.