Laser engraving cuts a cavity through the materials surface revealing an image that is noticable to the touch. Done with a high heat laser causing the material surface to vaporise.
Depth is usually around 0.125"
Similar to laser engraving but usually no more than 0.001" depth.
Done with a low powered beam by discolouring the material to create a high contrast without actually disrupting the material surface. The marking is done via oxidation under the surface causing it to turn black.
Each individual letter is hand stamped using steel letter stamps and a hammer. black enamel is used to make the letters stand out.