Reply by Dan

Will, I think two of them are Craftsman, one of them I got at Home Depot not sure of the brand and the other one I am not sure.

Two of them do not lock down square making them almost useless. The other two I have tuned myself to make them more accurate but I have problems locking the ruler in place and sliding it. Its actually just minor things and I can work around them and have but I just use them so often that it would be nice to have one with out having to work around it. Also the faces on the square get scratched up pretty easily by my blades (I often use the squares to check my hand tool blades) and this leaves me having to sand them back to flat after a while.

-- Dan - "Collector of Hand Planes"