I have not come up with a reason for 3/8 threaded holes with 5/16" through holes or a reasonable excuse for making them that way. Seems that all the Asian blocks are that way. I did watch that Bailey video last year hoping to find out why, but no such luck. I use them as spacers, cheaper than solid blocks.From the website "The blocks have 23 holes through them. Five are threaded 3/8-16 NC, and the other through holes are 5/16" diameter." What is the point of that? It just makes them as useful as a solid block!
edit Although I guess they are lighter........
Cheers Phil
I like the Moore set a lot. No protruding bolt heads. Sometimes a small bolted up angle plate is just what is needed.Interesting short video from Suburban Tool. ..
Daryl
MN