Corner Cutters JR and SR are my own design and creation that enables you to cut out box corners accurately, Faster, Easier and Better. This is a fantastic ruler that you will use repeatedly for all your box corner for whatever project you are creating.
Using a 45mm rotary cutter, simply place down on the bottom and right edges of your fabrics where you need to cut out the box corner. Cut 1 (one) cut horizontally and 1 (one) cut vertically and the corner square comes out. No more lining up you existing grid ruler, marking with a marking tool, using scissors and cutting.
Corner Cutters are cut from clear 1/8" acrylic (paper still affixed for better pictures). A lovely lady suggested the "cut in" sections in the corner and this concept allows the 45mm blade to cut to the inside corner, even with 2 (two) layers of fabric, which allows you to cut more than 1 (one) corner at a time, for even more time saving.
Corner Cutter JR cuts box corners 1", 1 1/2", 2" and 2 1/2" corners.
Corner Cutter SR cuts box corners 3", 3 1/2", 4" and 4 1/2" corners.