While round, random-orbit sanding discs may be what we use for the first stages of the sanding process, the best “final” sanding should be done by hand. Typically, that means tearing up 9 x11-in. sandpaper sheets in order to fit them to hand-sanding blocks, or even to your half- or quarter-sheet “jitterbug” sander. You can do it by eye against a straightedge, but Rockler has an inexpensive new guide to help you get spot-on sizing and tearing results every time. The new Sandpaper Cutter is made of 18-gauge galvanized steel with a slot and cutting edge built right in. Simply insert the sheet through the slot, and line up the opposite edge of the paper to one of four reference lines. 
They will tell you where proper alignment is for dividing the sandpaper into half-, third- or quarter-size sections. Pull up and back against the cutting edge to tear it cleanly. The Sandpaper Cutter (item 51415) can be used freehand, or attach it to a wall or cabinet door through the provided mounting holes. It’s available now online, through the catalog or at Rockler stores, nationwide. It sells for $12.99.
