Sandpaper cutter - The sheet cutter makes it almost fun to size sandpaper. A hacksaw blade is screwed to a piece of plywood with enough slack to permit the sheet to easily fit under. A piece of thin plywood is glued to the blade to make it easy to press the blade firmly onto the back of the paper prior to tearing it. A slat is placed in one of the table-sawn kerfs that provide the right width. The most common are 1/3 sheets made by cutting across the narrow width of one sheet.
SNIJLAB's Reusable Wood Booklets Can be Flat-Packed for Easy Transport