https://chippingwithcharm.blogspot.com/2012/02/metal-ruler-pin-board.html
Chipping with Charm: Metal Ruler "Pin Board"...
I know, I know...in this age of "online pin boards"...(which I enjoy very, VERY much by the way)...there isn't much need for an old fashion...
metal rulerchippingcharmboard
https://eshop.koh-i-noor.eu/catalogue_c628126082161245/drawing-instruments_c592069831690025/rulers_c592069831690126/metal-ruler-40cm-holder_p28576
metal ruler 40cm holder
metal rulerholder