Cordless cut-out tools spin their bits like a drill but cut like a saw into drywall and other materials. Also called spiral saws and drywall routers, they make a plunge cut and then move up, down, or sideways to cut through material. Their barrel-grip body allows for fine control to cut along a straightedge, make curved freehand cuts, and follow the shape of electrical boxes, panels, and frames to make cutouts. The bit rotation lends itself to clockwise cuts when tracing inside a box and counterclockwise cuts when tracing outside a box. They have an adjustable depth gauge to control how far the bit cuts into materials. The gauge can be removed to make deep cuts. These tools run on batteries, so they are more portable than corded tools and allow use where access to a wired power source is unavailable. They use brand-specific batteries, which fit different tools from the same manufacturer. Battery voltage and series must be compatible with the tool.