This design was requested by some of our customers. Measuring 0.150 X 0.085", with a slight bevel on each of the four edges to provide the user an easy to control tip (flat in this case would slide around).
The OTD Diamond tip gives a moderate texture, with the ability to vary the pattern slightly depending on the depth pushed into the material. One can use just the top of the tip, or sink it in a touch deeper using just past the bevel to achieve a slightly larger, and deeper diamond shape. In the picture of a Glock floor plate above, I used the shallow technique on one side and deeper on the other.
4-7 on the OTD Grip Index