Review on Relitec Positioning Woodworking Carpentry Carpenter: Enhancing Precision in Woodworking Projects by Derek Pape

I had them for a while before I had a chance to use them. When I used them on my last project they worked well and with a couple of clamps they held my work piece at a 90 degree angle for fastening. I've tested them on the machinists' place and they're pretty accurate. If you need such a tool, I can recommend them.