Durometer
it's hardness
K110 tool steel typically achieves a hardness of around 58-62 HRC (Rockwell Hardness Scale) after heat treatment, making it suitable for applications requiring good wear resistance and toughness. Tool steel 2130, on the other hand, generally has a hardness of approximately 50-55 HRC when heat treated, which provides a balance between hardness and ductility for various tooling applications.
gridlines
The presence of buds at the nodes
hammer
Most diamonds are used in industry and not in jewelry. Their hardness makes diamond useful as a cutting tool.
its low hardness score
Coating a tool with diamond renders the tool able to cut through its target, because of diamond's hardness, and to cut with precision.
The Janka Hardness Scale rates the hardness of hardwood flooring and bamboo as well. You can read more about the Janka Scale and see a list of the Janka Hardness Ratings from FindAnyFloor here http://www.findanyfloor.com/hardwood/JankaHardnessRatings.xhtml
it loses hardness at high temperatures.
S7 tool steel is produced and supplied to the machinist or tool maker in the annealed or soft condition. S-7 is typically heat treated and used in the Rockwell C hardness range of RC 54-59. Form more specific information about S-7 tool steel and heat treating, see the related links below.
the clock identifys the time in some parts of the globe