Long Shredder Conical with HandleLong Shredder Conical with Handle The Conical Shredder indispensable for longer strokes, good for texturing and working on rounded surfaces. The Shredder is an indispensable tool for shaping and carving leather hard clay. For years you could find a tool like this at the hardware store. This type of rasp was originally designed to be used on wood, but clay people, sculptors and auto body repairmen discovered how well the blade worked on other materials