Cutting speed and wire temperature combine to determine the thickness and consistency of kerf. A nonuniform feed rate can lead to a kerf of varying thickness. Depending upon material thickness, kerf widths as small as are possible. One major advantage of wire saws is their smaller kerf, as compared to a blade. The frame follows the blade down the kerf into the panel. When a fine blade is used, the kerf of a scroll saw is almost invisible. The smaller kerf on these blades dramatically increased the yield from a given log. Blades are marked with their number of teeth, kerf and hook angle. See Saw and Sawfiler for more detailed information about set, kerf, and maintenance of saws. The kerf is how much material is removed in making the cut. A "kerf" is the opening in the wood made by the saw. Scornet proved upper bounds on the rates of consistency for centered KeRF and uniform KeRF. Kerf anchorage systems operate in much the same way with different metal hardware.