This is a very handy tool for cutting square corners on endpapers and book covers.

Made of clear acrylic, 150 x 500mm or 150 x 300mm.

Also has multiple degree angle lines for easy pivot of 30º, 45º and 60º cuts, Left and right-hand numbering and angle system. 

We have several of these in our commercial sized sewing room, where they are an essential tool for pattern making and marking out material.