Is there a Japanese Riyobi Makita as head of the Ryobi and Makita tool brands?
Ryobi is not associated with Makita they are two separate companies.
What kind of nail gun do you need for 2 and one half inch nails?
one that can handle the length and gauge of the nail
When was the Black and Decker workmate 400 first made?
The Workmate was developed in the late '60s in England by Ron Hickman, a South African who designed the Lotus Elan.
The first Workmate bench was offered in the UK in 1973 and the US in '75.
I don't know when the 400 was made but I have an early version that does not have a number and a later one marked as a 550.
Don't know the date, but I recall reading a history of it in a book about workshop design. The story also mentions details such as the cast-aluminum frame of the early design, and the fact that Sears attempted to steal the concept...
I believe the Workmate was invented in the U.K..