Bharat Dot Punches makes clear witness marks as the point is ground and sharpened to make an angle of 60 °. The handle is knurled for a firm and comfortable grip.
Sharp lines tend to disappear while filing metal, as Burrs are constantly produced On the edge of a piece of metal. In order that lines can be seen more clearly feint dots, called witness marks, can be lightly punched around the entire shape (that will be cut-out). A dot punch is used, along with a hammer, to create witness marks.