Crab shell powder is powerful when used in reversing magick. The hard shells do not turn into a fine powder but are bits and pieces and powdered up shell. Each packet will have a claw in it for that extra pinch. Use this when working to remove a curse put on you and send it back to its maker. Undo negative and crossed situations and hexes or jinxes. When you do a reversing spell or a mirror box throw some crab shell powder in with sharp objects and reversing herbs. This crab powder came from thoroughly cleaned and oven dried crab shells.